diff --git a/documentation/notes.md b/documentation/notes.md
index 364d75c..4ff408e 100644
--- a/documentation/notes.md
+++ b/documentation/notes.md
@@ -4,8 +4,6 @@
 
 - pinning dependencies in package.json files
 - rethink organisation of datafiles and wordlists
-- add this to drizzle migrations file:
-  ✅ ALTER TABLE terms ADD CHECK (pos IN ('noun', 'verb', 'adjective', etc));
 
 ## openwordnet
 
diff --git a/documentation/roadmap.md b/documentation/roadmap.md
index 5fba9ee..db130f7 100644
--- a/documentation/roadmap.md
+++ b/documentation/roadmap.md
@@ -29,10 +29,9 @@ Done when: `GET /api/decks/1/terms?limit=10` returns 10 terms from a specific de
 [x] Write and run migration (includes CHECK constraints for `pos`, `gloss_type`)
 [x] Write `packages/db/src/seed.ts` (imports ALL terms + translations, NO decks)
 [x] Download CEFR A1/A2 noun lists (from GitHub repos)
-[ ] Write `scripts/build_decks.ts` (reads external CEFR lists, matches to DB, creates decks)
-[ ] check notes.md
-[ ] Run `pnpm db:seed` → populates terms
-[ ] Run `pnpm db:build-decks` → creates curated decks
+[x] Write `scripts/build_decks.ts` (reads external CEFR lists, matches to DB, creates decks)
+[x] Run `pnpm db:seed` → populates terms
+[x] Run `pnpm db:build-deck` → creates curated decks
 [ ] Define Zod response schemas in `packages/shared`
 [ ] Implement `DeckRepository.getTerms(deckId, limit, offset)`
 [ ] Implement `QuizService.attachDistractors(terms)` — same POS, server-side, no duplicates
diff --git a/packages/db/drizzle/0000_bitter_turbo.sql b/packages/db/drizzle/0000_faithful_oracle.sql
similarity index 83%
rename from packages/db/drizzle/0000_bitter_turbo.sql
rename to packages/db/drizzle/0000_faithful_oracle.sql
index ed93e47..d55e3b3 100644
--- a/packages/db/drizzle/0000_bitter_turbo.sql
+++ b/packages/db/drizzle/0000_faithful_oracle.sql
@@ -1,7 +1,6 @@
 CREATE TABLE "deck_terms" (
 	"deck_id" uuid NOT NULL,
 	"term_id" uuid NOT NULL,
-	"position" integer NOT NULL,
 	"added_at" timestamp with time zone DEFAULT now() NOT NULL,
 	CONSTRAINT "deck_terms_deck_id_term_id_pk" PRIMARY KEY("deck_id","term_id")
 );
@@ -10,11 +9,14 @@ CREATE TABLE "decks" (
 	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
 	"name" text NOT NULL,
 	"description" text,
-	"language_pair_id" uuid NOT NULL,
-	"created_by" uuid NOT NULL,
+	"source_language" varchar(10) NOT NULL,
+	"validated_languages" varchar(10)[] DEFAULT '{}' NOT NULL,
 	"is_public" boolean DEFAULT false NOT NULL,
 	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
-	CONSTRAINT "unique_deck_name" UNIQUE("name","created_by")
+	CONSTRAINT "unique_deck_name" UNIQUE("name","source_language"),
+	CONSTRAINT "source_language_check" CHECK ("decks"."source_language" IN ('en', 'it')),
+	CONSTRAINT "validated_languages_check" CHECK (validated_languages <@ ARRAY['en', 'it']::varchar[]),
+	CONSTRAINT "validated_languages_excludes_source" CHECK (NOT ("decks"."source_language" = ANY("decks"."validated_languages")))
 );
 --> statement-breakpoint
 CREATE TABLE "language_pairs" (
@@ -71,14 +73,10 @@ CREATE TABLE "users" (
 --> statement-breakpoint
 ALTER TABLE "deck_terms" ADD CONSTRAINT "deck_terms_deck_id_decks_id_fk" FOREIGN KEY ("deck_id") REFERENCES "public"."decks"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
 ALTER TABLE "deck_terms" ADD CONSTRAINT "deck_terms_term_id_terms_id_fk" FOREIGN KEY ("term_id") REFERENCES "public"."terms"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
-ALTER TABLE "decks" ADD CONSTRAINT "decks_language_pair_id_language_pairs_id_fk" FOREIGN KEY ("language_pair_id") REFERENCES "public"."language_pairs"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
-ALTER TABLE "decks" ADD CONSTRAINT "decks_created_by_users_id_fk" FOREIGN KEY ("created_by") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
 ALTER TABLE "term_glosses" ADD CONSTRAINT "term_glosses_term_id_terms_id_fk" FOREIGN KEY ("term_id") REFERENCES "public"."terms"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
 ALTER TABLE "translations" ADD CONSTRAINT "translations_term_id_terms_id_fk" FOREIGN KEY ("term_id") REFERENCES "public"."terms"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
 CREATE INDEX "idx_deck_terms_term" ON "deck_terms" USING btree ("term_id");--> statement-breakpoint
-CREATE INDEX "idx_decks_created_by" ON "decks" USING btree ("created_by");--> statement-breakpoint
-CREATE INDEX "idx_decks_language_pair" ON "decks" USING btree ("language_pair_id");--> statement-breakpoint
 CREATE INDEX "idx_pairs_active" ON "language_pairs" USING btree ("active","source_language","target_language");--> statement-breakpoint
 CREATE INDEX "idx_term_glosses_term" ON "term_glosses" USING btree ("term_id");--> statement-breakpoint
 CREATE INDEX "idx_terms_pos" ON "terms" USING btree ("pos");--> statement-breakpoint
-CREATE INDEX "idx_translations_lang" ON "translations" USING btree ("language_code","term_id");
+CREATE INDEX "idx_translations_lang" ON "translations" USING btree ("language_code","term_id");
\ No newline at end of file
diff --git a/packages/db/drizzle/0001_medical_fabian_cortez.sql b/packages/db/drizzle/0001_medical_fabian_cortez.sql
deleted file mode 100644
index f202780..0000000
--- a/packages/db/drizzle/0001_medical_fabian_cortez.sql
+++ /dev/null
@@ -1,13 +0,0 @@
-ALTER TABLE "decks" DROP CONSTRAINT "unique_deck_name";--> statement-breakpoint
-ALTER TABLE "decks" DROP CONSTRAINT "decks_language_pair_id_language_pairs_id_fk";
---> statement-breakpoint
-ALTER TABLE "decks" DROP CONSTRAINT "decks_created_by_users_id_fk";
---> statement-breakpoint
-DROP INDEX "idx_decks_created_by";--> statement-breakpoint
-DROP INDEX "idx_decks_language_pair";--> statement-breakpoint
-ALTER TABLE "decks" ADD COLUMN "validated_for_languages" varchar(10)[] DEFAULT '{}' NOT NULL;--> statement-breakpoint
-ALTER TABLE "deck_terms" DROP COLUMN "position";--> statement-breakpoint
-ALTER TABLE "decks" DROP COLUMN "language_pair_id";--> statement-breakpoint
-ALTER TABLE "decks" DROP COLUMN "created_by";--> statement-breakpoint
-ALTER TABLE "decks" ADD CONSTRAINT "unique_deck_name" UNIQUE("name");--> statement-breakpoint
-ALTER TABLE "decks" ADD CONSTRAINT "validated_languages_check" CHECK (validated_for_languages <@ ARRAY['en', 'it']::varchar[]);
\ No newline at end of file
diff --git a/packages/db/drizzle/meta/0000_snapshot.json b/packages/db/drizzle/meta/0000_snapshot.json
index 81d5b02..4ca9a86 100644
--- a/packages/db/drizzle/meta/0000_snapshot.json
+++ b/packages/db/drizzle/meta/0000_snapshot.json
@@ -1,5 +1,5 @@
 {
-  "id": "5830ce3b-dc0e-44a7-83d6-bc74016ca4fd",
+  "id": "9ef7c86d-9e64-42d6-9731-2c1794ab063e",
   "prevId": "00000000-0000-0000-0000-000000000000",
   "version": "7",
   "dialect": "postgresql",
@@ -20,12 +20,6 @@
           "primaryKey": false,
           "notNull": true
         },
-        "position": {
-          "name": "position",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true
-        },
         "added_at": {
           "name": "added_at",
           "type": "timestamp with time zone",
@@ -56,8 +50,12 @@
           "name": "deck_terms_deck_id_decks_id_fk",
           "tableFrom": "deck_terms",
           "tableTo": "decks",
-          "columnsFrom": ["deck_id"],
-          "columnsTo": ["id"],
+          "columnsFrom": [
+            "deck_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
           "onDelete": "cascade",
           "onUpdate": "no action"
         },
@@ -65,8 +63,12 @@
           "name": "deck_terms_term_id_terms_id_fk",
           "tableFrom": "deck_terms",
           "tableTo": "terms",
-          "columnsFrom": ["term_id"],
-          "columnsTo": ["id"],
+          "columnsFrom": [
+            "term_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
           "onDelete": "cascade",
           "onUpdate": "no action"
         }
@@ -74,7 +76,10 @@
       "compositePrimaryKeys": {
         "deck_terms_deck_id_term_id_pk": {
           "name": "deck_terms_deck_id_term_id_pk",
-          "columns": ["deck_id", "term_id"]
+          "columns": [
+            "deck_id",
+            "term_id"
+          ]
         }
       },
       "uniqueConstraints": {},
@@ -105,17 +110,18 @@
           "primaryKey": false,
           "notNull": false
         },
-        "language_pair_id": {
-          "name": "language_pair_id",
-          "type": "uuid",
+        "source_language": {
+          "name": "source_language",
+          "type": "varchar(10)",
           "primaryKey": false,
           "notNull": true
         },
-        "created_by": {
-          "name": "created_by",
-          "type": "uuid",
+        "validated_languages": {
+          "name": "validated_languages",
+          "type": "varchar(10)[]",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "default": "'{}'"
         },
         "is_public": {
           "name": "is_public",
@@ -132,68 +138,34 @@
           "default": "now()"
         }
       },
-      "indexes": {
-        "idx_decks_created_by": {
-          "name": "idx_decks_created_by",
-          "columns": [
-            {
-              "expression": "created_by",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        },
-        "idx_decks_language_pair": {
-          "name": "idx_decks_language_pair",
-          "columns": [
-            {
-              "expression": "language_pair_id",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {
-        "decks_language_pair_id_language_pairs_id_fk": {
-          "name": "decks_language_pair_id_language_pairs_id_fk",
-          "tableFrom": "decks",
-          "tableTo": "language_pairs",
-          "columnsFrom": ["language_pair_id"],
-          "columnsTo": ["id"],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        },
-        "decks_created_by_users_id_fk": {
-          "name": "decks_created_by_users_id_fk",
-          "tableFrom": "decks",
-          "tableTo": "users",
-          "columnsFrom": ["created_by"],
-          "columnsTo": ["id"],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
+      "indexes": {},
+      "foreignKeys": {},
       "compositePrimaryKeys": {},
       "uniqueConstraints": {
         "unique_deck_name": {
           "name": "unique_deck_name",
           "nullsNotDistinct": false,
-          "columns": ["name", "created_by"]
+          "columns": [
+            "name",
+            "source_language"
+          ]
         }
       },
       "policies": {},
-      "checkConstraints": {},
+      "checkConstraints": {
+        "source_language_check": {
+          "name": "source_language_check",
+          "value": "\"decks\".\"source_language\" IN ('en', 'it')"
+        },
+        "validated_languages_check": {
+          "name": "validated_languages_check",
+          "value": "validated_languages <@ ARRAY['en', 'it']::varchar[]"
+        },
+        "validated_languages_excludes_source": {
+          "name": "validated_languages_excludes_source",
+          "value": "NOT (\"decks\".\"source_language\" = ANY(\"decks\".\"validated_languages\"))"
+        }
+      },
       "isRLSEnabled": false
     },
     "public.language_pairs": {
@@ -275,7 +247,10 @@
         "unique_source_target": {
           "name": "unique_source_target",
           "nullsNotDistinct": false,
-          "columns": ["source_language", "target_language"]
+          "columns": [
+            "source_language",
+            "target_language"
+          ]
         }
       },
       "policies": {},
@@ -354,8 +329,12 @@
           "name": "term_glosses_term_id_terms_id_fk",
           "tableFrom": "term_glosses",
           "tableTo": "terms",
-          "columnsFrom": ["term_id"],
-          "columnsTo": ["id"],
+          "columnsFrom": [
+            "term_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
           "onDelete": "cascade",
           "onUpdate": "no action"
         }
@@ -365,7 +344,11 @@
         "unique_term_gloss": {
           "name": "unique_term_gloss",
           "nullsNotDistinct": false,
-          "columns": ["term_id", "language_code", "text"]
+          "columns": [
+            "term_id",
+            "language_code",
+            "text"
+          ]
         }
       },
       "policies": {},
@@ -426,7 +409,9 @@
         "terms_synset_id_unique": {
           "name": "terms_synset_id_unique",
           "nullsNotDistinct": false,
-          "columns": ["synset_id"]
+          "columns": [
+            "synset_id"
+          ]
         }
       },
       "policies": {},
@@ -503,8 +488,12 @@
           "name": "translations_term_id_terms_id_fk",
           "tableFrom": "translations",
           "tableTo": "terms",
-          "columnsFrom": ["term_id"],
-          "columnsTo": ["id"],
+          "columnsFrom": [
+            "term_id"
+          ],
+          "columnsTo": [
+            "id"
+          ],
           "onDelete": "cascade",
           "onUpdate": "no action"
         }
@@ -514,7 +503,11 @@
         "unique_translations": {
           "name": "unique_translations",
           "nullsNotDistinct": false,
-          "columns": ["term_id", "language_code", "text"]
+          "columns": [
+            "term_id",
+            "language_code",
+            "text"
+          ]
         }
       },
       "policies": {},
@@ -571,17 +564,23 @@
         "users_openauth_sub_unique": {
           "name": "users_openauth_sub_unique",
           "nullsNotDistinct": false,
-          "columns": ["openauth_sub"]
+          "columns": [
+            "openauth_sub"
+          ]
         },
         "users_email_unique": {
           "name": "users_email_unique",
           "nullsNotDistinct": false,
-          "columns": ["email"]
+          "columns": [
+            "email"
+          ]
         },
         "users_display_name_unique": {
           "name": "users_display_name_unique",
           "nullsNotDistinct": false,
-          "columns": ["display_name"]
+          "columns": [
+            "display_name"
+          ]
         }
       },
       "policies": {},
@@ -595,5 +594,9 @@
   "roles": {},
   "policies": {},
   "views": {},
-  "_meta": { "columns": {}, "schemas": {}, "tables": {} }
-}
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}
\ No newline at end of file
diff --git a/packages/db/drizzle/meta/0001_snapshot.json b/packages/db/drizzle/meta/0001_snapshot.json
deleted file mode 100644
index 41a8dbd..0000000
--- a/packages/db/drizzle/meta/0001_snapshot.json
+++ /dev/null
@@ -1,587 +0,0 @@
-{
-  "id": "d6bed73d-ee69-44b1-a3ce-3ae25898a6f0",
-  "prevId": "5830ce3b-dc0e-44a7-83d6-bc74016ca4fd",
-  "version": "7",
-  "dialect": "postgresql",
-  "tables": {
-    "public.deck_terms": {
-      "name": "deck_terms",
-      "schema": "",
-      "columns": {
-        "deck_id": {
-          "name": "deck_id",
-          "type": "uuid",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "term_id": {
-          "name": "term_id",
-          "type": "uuid",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "added_at": {
-          "name": "added_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        }
-      },
-      "indexes": {
-        "idx_deck_terms_term": {
-          "name": "idx_deck_terms_term",
-          "columns": [
-            {
-              "expression": "term_id",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {
-        "deck_terms_deck_id_decks_id_fk": {
-          "name": "deck_terms_deck_id_decks_id_fk",
-          "tableFrom": "deck_terms",
-          "tableTo": "decks",
-          "columnsFrom": [
-            "deck_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        },
-        "deck_terms_term_id_terms_id_fk": {
-          "name": "deck_terms_term_id_terms_id_fk",
-          "tableFrom": "deck_terms",
-          "tableTo": "terms",
-          "columnsFrom": [
-            "term_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {
-        "deck_terms_deck_id_term_id_pk": {
-          "name": "deck_terms_deck_id_term_id_pk",
-          "columns": [
-            "deck_id",
-            "term_id"
-          ]
-        }
-      },
-      "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.decks": {
-      "name": "decks",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "uuid",
-          "primaryKey": true,
-          "notNull": true,
-          "default": "gen_random_uuid()"
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "description": {
-          "name": "description",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "validated_for_languages": {
-          "name": "validated_for_languages",
-          "type": "varchar(10)[]",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "'{}'"
-        },
-        "is_public": {
-          "name": "is_public",
-          "type": "boolean",
-          "primaryKey": false,
-          "notNull": true,
-          "default": false
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "unique_deck_name": {
-          "name": "unique_deck_name",
-          "nullsNotDistinct": false,
-          "columns": [
-            "name"
-          ]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {
-        "validated_languages_check": {
-          "name": "validated_languages_check",
-          "value": "validated_for_languages <@ ARRAY['en', 'it']::varchar[]"
-        }
-      },
-      "isRLSEnabled": false
-    },
-    "public.language_pairs": {
-      "name": "language_pairs",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "uuid",
-          "primaryKey": true,
-          "notNull": true,
-          "default": "gen_random_uuid()"
-        },
-        "source_language": {
-          "name": "source_language",
-          "type": "varchar(10)",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "target_language": {
-          "name": "target_language",
-          "type": "varchar(10)",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "label": {
-          "name": "label",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "active": {
-          "name": "active",
-          "type": "boolean",
-          "primaryKey": false,
-          "notNull": true,
-          "default": true
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        }
-      },
-      "indexes": {
-        "idx_pairs_active": {
-          "name": "idx_pairs_active",
-          "columns": [
-            {
-              "expression": "active",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            },
-            {
-              "expression": "source_language",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            },
-            {
-              "expression": "target_language",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "unique_source_target": {
-          "name": "unique_source_target",
-          "nullsNotDistinct": false,
-          "columns": [
-            "source_language",
-            "target_language"
-          ]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {
-        "source_language_check": {
-          "name": "source_language_check",
-          "value": "\"language_pairs\".\"source_language\" IN ('en', 'it')"
-        },
-        "target_language_check": {
-          "name": "target_language_check",
-          "value": "\"language_pairs\".\"target_language\" IN ('en', 'it')"
-        },
-        "no_self_pair": {
-          "name": "no_self_pair",
-          "value": "\"language_pairs\".\"source_language\" != \"language_pairs\".\"target_language\""
-        }
-      },
-      "isRLSEnabled": false
-    },
-    "public.term_glosses": {
-      "name": "term_glosses",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "uuid",
-          "primaryKey": true,
-          "notNull": true,
-          "default": "gen_random_uuid()"
-        },
-        "term_id": {
-          "name": "term_id",
-          "type": "uuid",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "language_code": {
-          "name": "language_code",
-          "type": "varchar(10)",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "text": {
-          "name": "text",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        }
-      },
-      "indexes": {
-        "idx_term_glosses_term": {
-          "name": "idx_term_glosses_term",
-          "columns": [
-            {
-              "expression": "term_id",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {
-        "term_glosses_term_id_terms_id_fk": {
-          "name": "term_glosses_term_id_terms_id_fk",
-          "tableFrom": "term_glosses",
-          "tableTo": "terms",
-          "columnsFrom": [
-            "term_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "unique_term_gloss": {
-          "name": "unique_term_gloss",
-          "nullsNotDistinct": false,
-          "columns": [
-            "term_id",
-            "language_code",
-            "text"
-          ]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.terms": {
-      "name": "terms",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "uuid",
-          "primaryKey": true,
-          "notNull": true,
-          "default": "gen_random_uuid()"
-        },
-        "synset_id": {
-          "name": "synset_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "pos": {
-          "name": "pos",
-          "type": "varchar(20)",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        }
-      },
-      "indexes": {
-        "idx_terms_pos": {
-          "name": "idx_terms_pos",
-          "columns": [
-            {
-              "expression": "pos",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "terms_synset_id_unique": {
-          "name": "terms_synset_id_unique",
-          "nullsNotDistinct": false,
-          "columns": [
-            "synset_id"
-          ]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {
-        "pos_check": {
-          "name": "pos_check",
-          "value": "\"terms\".\"pos\" IN ('noun')"
-        }
-      },
-      "isRLSEnabled": false
-    },
-    "public.translations": {
-      "name": "translations",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "uuid",
-          "primaryKey": true,
-          "notNull": true,
-          "default": "gen_random_uuid()"
-        },
-        "term_id": {
-          "name": "term_id",
-          "type": "uuid",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "language_code": {
-          "name": "language_code",
-          "type": "varchar(10)",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "text": {
-          "name": "text",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        }
-      },
-      "indexes": {
-        "idx_translations_lang": {
-          "name": "idx_translations_lang",
-          "columns": [
-            {
-              "expression": "language_code",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            },
-            {
-              "expression": "term_id",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {
-        "translations_term_id_terms_id_fk": {
-          "name": "translations_term_id_terms_id_fk",
-          "tableFrom": "translations",
-          "tableTo": "terms",
-          "columnsFrom": [
-            "term_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "unique_translations": {
-          "name": "unique_translations",
-          "nullsNotDistinct": false,
-          "columns": [
-            "term_id",
-            "language_code",
-            "text"
-          ]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.users": {
-      "name": "users",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "uuid",
-          "primaryKey": true,
-          "notNull": true,
-          "default": "gen_random_uuid()"
-        },
-        "openauth_sub": {
-          "name": "openauth_sub",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "email": {
-          "name": "email",
-          "type": "varchar(255)",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "display_name": {
-          "name": "display_name",
-          "type": "varchar(100)",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "now()"
-        },
-        "last_login_at": {
-          "name": "last_login_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": false
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "users_openauth_sub_unique": {
-          "name": "users_openauth_sub_unique",
-          "nullsNotDistinct": false,
-          "columns": [
-            "openauth_sub"
-          ]
-        },
-        "users_email_unique": {
-          "name": "users_email_unique",
-          "nullsNotDistinct": false,
-          "columns": [
-            "email"
-          ]
-        },
-        "users_display_name_unique": {
-          "name": "users_display_name_unique",
-          "nullsNotDistinct": false,
-          "columns": [
-            "display_name"
-          ]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    }
-  },
-  "enums": {},
-  "schemas": {},
-  "sequences": {},
-  "roles": {},
-  "policies": {},
-  "views": {},
-  "_meta": {
-    "columns": {},
-    "schemas": {},
-    "tables": {}
-  }
-}
\ No newline at end of file
diff --git a/packages/db/drizzle/meta/_journal.json b/packages/db/drizzle/meta/_journal.json
index ac05b81..32b70b7 100644
--- a/packages/db/drizzle/meta/_journal.json
+++ b/packages/db/drizzle/meta/_journal.json
@@ -5,15 +5,8 @@
     {
       "idx": 0,
       "version": "7",
-      "when": 1774721919883,
-      "tag": "0000_bitter_turbo",
-      "breakpoints": true
-    },
-    {
-      "idx": 1,
-      "version": "7",
-      "when": 1774970553186,
-      "tag": "0001_medical_fabian_cortez",
+      "when": 1775053965903,
+      "tag": "0000_faithful_oracle",
       "breakpoints": true
     }
   ]
diff --git a/packages/db/package.json b/packages/db/package.json
index 3fbdc05..7194bb3 100644
--- a/packages/db/package.json
+++ b/packages/db/package.json
@@ -6,7 +6,9 @@
   "scripts": {
     "build": "tsc",
     "generate": "drizzle-kit generate",
-    "migrate": "drizzle-kit migrate"
+    "migrate": "drizzle-kit migrate",
+    "db:seed": "npx tsx src/seeding-datafiles.ts",
+    "db:build-deck": "npx tsx src/generating-deck.ts"
   },
   "dependencies": {
     "@glossa/shared": "workspace:*",
diff --git a/packages/db/src/data/wordlists/top1000englishnouns-missing b/packages/db/src/data/wordlists/top1000englishnouns-missing
new file mode 100644
index 0000000..08c21b2
--- /dev/null
+++ b/packages/db/src/data/wordlists/top1000englishnouns-missing
@@ -0,0 +1,34 @@
+a
+other
+us
+may
+st
+paul
+new
+software
+oxford
+english
+mary
+japan
+while
+pp
+membership
+manchester
+tony
+alan
+jones
+un
+northern
+simon
+behalf
+co
+graham
+joe
+guy
+lewis
+jane
+taylor
+co-operation
+travel
+self
+thatcher
\ No newline at end of file
diff --git a/packages/db/src/db/schema.ts b/packages/db/src/db/schema.ts
index 90604af..0d15015 100644
--- a/packages/db/src/db/schema.ts
+++ b/packages/db/src/db/schema.ts
@@ -144,11 +144,11 @@ export const decks = pgTable(
     ),
     check(
       "validated_languages_check",
-      sql`validated_for_languages <@ ARRAY[${sql.raw(SUPPORTED_LANGUAGE_CODES.map((l) => `'${l}'`).join(", "))}]::varchar[]`,
+      sql`validated_languages <@ ARRAY[${sql.raw(SUPPORTED_LANGUAGE_CODES.map((l) => `'${l}'`).join(", "))}]::varchar[]`,
     ),
     check(
       "validated_languages_excludes_source",
-      sql`NOT (${table.source_language} = ANY(validated_for_languages))`,
+      sql`NOT (${table.source_language} = ANY(${table.validated_languages}))`,
     ),
     unique("unique_deck_name").on(table.name, table.source_language),
   ],
diff --git a/packages/db/src/generating-deck.ts b/packages/db/src/generating-deck.ts
new file mode 100644
index 0000000..cc43eb5
--- /dev/null
+++ b/packages/db/src/generating-deck.ts
@@ -0,0 +1,302 @@
+/*
+ *
+ * Builds the "top English nouns" deck from a curated wordlist of the 1000 most
+ * frequently used English nouns. The deck has English as its source language —
+ * meaning it was curated from an English-centric frequency list, and a separate
+ * deck would be needed for other source languages. For each word in the list, all
+ * matching term IDs are looked up in the database via the translations table
+ * (language: "en", POS: "noun") — homonyms are intentionally included as separate
+ * cards since the quiz UI displays a gloss alongside each word. Words from the
+ * list that have no DB match are skipped and written to a file for future
+ * reference. The script is idempotent: if the deck already exists, only terms
+ * present in the source but missing from the deck are added; terms already in the
+ * deck are left untouched; terms in the deck but absent from the source are never
+ * removed. After resolving all matched terms, the script determines
+ * validated_for_languages by checking which languages — excluding the source
+ * language — have full translation coverage across all matched terms, and updates
+ * the array on every run.
+ */
+
+/*
+ * roadmap
+ *
+ * [x] Setup - hardcoded path, name, description, source language, POS
+ * [x] Read wordlist - load and deduplicate the 1000 nouns
+ * [x] Query terms - match to database, collect all term IDs per word (including homonyms)
+ * [x] Write missing words to file for future reference
+ * [x] Determine validated_languages - find languages (excluding source) with full coverage across all matched terms
+ * [x] Check idempotency - if deck exists, diff matched terms against existing deck_terms
+ * [x] Create deck if it doesn't exist - insert with name, source_language, validated_languages
+ * [x] Add new terms - insert only term IDs present in source but missing from deck
+ * [x] Update validated_languages - recalculate and update on every run
+ * [x] Report - summary of words found, missing, added, and validated languages
+ */
+
+import fs from "node:fs/promises";
+import { db } from "@glossa/db";
+import { translations, terms, decks, deck_terms } from "@glossa/db/schema";
+import { inArray, and, eq } from "drizzle-orm";
+import { SUPPORTED_LANGUAGE_CODES } from "@glossa/shared";
+
+const pathToWordlist = "./src/data/wordlists/top1000englishnouns";
+const nameOfDeck = "top english nouns";
+const descriptionOfDeck =
+  "Most frequently used English nouns for vocabulary practice";
+const sourceLanguage = "en";
+const sourcePOS = "noun";
+
+// new Set() automatically discards duplicate values,
+// and spreading it back with ... converts it to a plain array again.
+// So if "bank" appears twice in the file,
+// the resulting array will only contain it once.
+const readingFromWordlist = async () => {
+  const raw = await fs.readFile(pathToWordlist, "utf8");
+  const words = [
+    ...new Set(
+      raw
+        .split("\n")
+        .map((w) => w.trim().toLowerCase())
+        .filter(Boolean),
+    ),
+  ];
+  return words;
+};
+
+const checkingSourceWordsAgainstDB = async (words: string[]) => {
+  const rows = await db
+    .select({ text: translations.text, termId: translations.term_id })
+    .from(translations)
+    .innerJoin(terms, eq(translations.term_id, terms.id))
+    .where(
+      and(
+        inArray(translations.text, words),
+        eq(translations.language_code, sourceLanguage),
+        eq(terms.pos, sourcePOS),
+      ),
+    );
+
+  const wordToTermIds = new Map<string, string[]>();
+  for (const row of rows) {
+    const word = row.text.toLowerCase();
+    const existing = wordToTermIds.get(word) ?? [];
+    wordToTermIds.set(word, [...existing, row.termId]);
+  }
+  const termIds = [...new Set(Array.from(wordToTermIds.values()).flat())];
+  const missingWords = words.filter((w) => !wordToTermIds.has(w));
+
+  return { termIds, missingWords };
+};
+
+const writeMissingWordsToFile = async (missingWords: string[]) => {
+  const outputPath = `${pathToWordlist}-missing`;
+  await fs.writeFile(outputPath, missingWords.join("\n"), "utf8");
+};
+
+const validateLanguages = async (sourceLanguage: string, termIds: string[]) => {
+  // create array of language code from the supported languages
+  // remove source language from it
+  const languages = SUPPORTED_LANGUAGE_CODES.filter(
+    (language) => language !== sourceLanguage,
+  );
+  const validatedLanguages: string[] = [];
+  // For each remaining language, count how many of the termIds have a translation in that language
+  for (const language of languages) {
+    const rows = await db
+      .selectDistinct({ termId: translations.term_id })
+      .from(translations)
+      .where(
+        and(
+          inArray(translations.term_id, termIds),
+          eq(translations.language_code, language),
+        ),
+      );
+    if (rows.length === termIds.length) {
+      validatedLanguages.push(language);
+    }
+  }
+
+  // If the count equals termIds.length → full coverage → include in result
+  // Return the array of fully covered languages
+  return validatedLanguages;
+};
+
+// Check idempotency — if deck exists, diff matched terms against existing deck_terms
+const findExistingDeck = async () => {
+  const existing = await db
+    .select({ id: decks.id, validatedForLanguages: decks.validated_languages })
+    .from(decks)
+    .where(
+      and(
+        eq(decks.name, nameOfDeck),
+        eq(decks.source_language, sourceLanguage),
+      ),
+    );
+  return existing[0] ?? null;
+};
+
+// logging translation coverage per language across all matched terms
+const logLanguageCoverage = async (termIds: string[]) => {
+  const languages = SUPPORTED_LANGUAGE_CODES.filter(
+    (language) => language !== sourceLanguage,
+  );
+  for (const language of languages) {
+    const rows = await db
+      .selectDistinct({ termId: translations.term_id })
+      .from(translations)
+      .where(
+        and(
+          inArray(translations.term_id, termIds),
+          eq(translations.language_code, language),
+        ),
+      );
+    console.log(
+      `   ${language}: ${rows.length} / ${termIds.length} terms covered`,
+    );
+
+    const coveredIds = new Set(rows.map((r) => r.termId));
+    const missingTermIds = termIds.filter((id) => !coveredIds.has(id));
+    console.log(`   missing term IDs count:`, missingTermIds.length);
+
+    const missingEnglish = await db
+      .selectDistinct({ text: translations.text })
+      .from(translations)
+      .where(
+        and(
+          inArray(translations.term_id, missingTermIds),
+          eq(translations.language_code, "en"),
+        ),
+      );
+    console.log(
+      `   missing words in ${language}:`,
+      missingEnglish.map((r) => r.text),
+      "\n",
+    );
+  }
+};
+
+// creating a deck
+const createDeck = async (validatedLanguages: string[]) => {
+  const result = await db
+    .insert(decks)
+    .values({
+      name: nameOfDeck,
+      description: descriptionOfDeck,
+      source_language: sourceLanguage,
+      validated_languages: validatedLanguages,
+      is_public: false,
+    })
+    .returning({ id: decks.id });
+  const created = result[0];
+  if (!created) throw new Error("Failed to create deck: no row returned");
+  return created.id;
+};
+
+// Diffs termIds against the existing deck_terms for this deck and inserts only
+// the ones not already present. Returns the count of newly inserted terms.
+const addTermsToDeck = async (
+  deckId: string,
+  termIds: string[],
+): Promise<number> => {
+  const existingRows = await db
+    .select({ termId: deck_terms.term_id })
+    .from(deck_terms)
+    .where(eq(deck_terms.deck_id, deckId));
+
+  const existingTermIds = new Set(existingRows.map((r) => r.termId));
+  const newTermIds = termIds.filter((id) => !existingTermIds.has(id));
+
+  if (newTermIds.length === 0) return 0;
+
+  await db
+    .insert(deck_terms)
+    .values(newTermIds.map((termId) => ({ deck_id: deckId, term_id: termId })));
+
+  return newTermIds.length;
+};
+
+// Recalculates and persists validated_languages on every run so the field stays
+// accurate as translation coverage grows over time.
+const updateValidatedLanguages = async (
+  deckId: string,
+  validatedLanguages: string[],
+): Promise<void> => {
+  await db
+    .update(decks)
+    .set({ validated_languages: validatedLanguages })
+    .where(eq(decks.id, deckId));
+};
+
+const main = async () => {
+  console.log("📖 Reading word list...");
+  const sourceWords = await readingFromWordlist();
+  console.log(`   ${sourceWords.length} words loaded\n`);
+
+  console.log("🔍 Checking against database...");
+  const { termIds, missingWords } =
+    await checkingSourceWordsAgainstDB(sourceWords);
+  console.log(`   ${termIds.length} terms found`);
+  console.log(`   ${missingWords.length} words not found in DB\n`);
+
+  console.log("🖊️ Writing missing words to file...\n");
+  await writeMissingWordsToFile(missingWords);
+
+  console.log("✅ Validating languages...");
+  const validatedLanguages = await validateLanguages(sourceLanguage, termIds);
+  console.log(
+    `   Validated languages: ${JSON.stringify(validatedLanguages)}\n`,
+  );
+
+  console.log("🔬 Language coverage breakdown...");
+  await logLanguageCoverage(termIds);
+
+  console.log("🃏 Looking for existing deck...");
+  const existingDeck = await findExistingDeck();
+
+  let deckId: string;
+  let isNewDeck: boolean;
+
+  if (!existingDeck) {
+    console.log("   No existing deck found, will create one\n");
+    console.log("🆕 Creating deck...");
+    deckId = await createDeck(validatedLanguages);
+    console.log(`   Deck created with id: ${deckId}\n`);
+    isNewDeck = true;
+  } else {
+    console.log(`   Found existing deck with id: ${existingDeck.id}\n`);
+    deckId = existingDeck.id;
+    isNewDeck = false;
+  }
+
+  console.log("➕ Adding terms to deck...");
+  const addedCount = await addTermsToDeck(deckId, termIds);
+  const alreadyPresentCount = termIds.length - addedCount;
+  console.log(`   ${addedCount} terms added`);
+  console.log(`   ${alreadyPresentCount} terms already in deck\n`);
+
+  if (!isNewDeck) {
+    console.log("🔄 Updating validated languages...");
+    await updateValidatedLanguages(deckId, validatedLanguages);
+    console.log(`   Updated to: ${JSON.stringify(validatedLanguages)}\n`);
+  }
+
+  console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
+  console.log("📊 Summary");
+  console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
+  console.log(`   Words loaded from wordlist : ${sourceWords.length}`);
+  console.log(
+    `   Words matched in DB        : ${sourceWords.length - missingWords.length}`,
+  );
+  console.log(`   Words not found in DB      : ${missingWords.length}`);
+  console.log(`   Term IDs resolved          : ${termIds.length}`);
+  console.log(`   Terms added to deck        : ${addedCount}`);
+  console.log(`   Terms already in deck      : ${alreadyPresentCount}`);
+  console.log(
+    `   Validated languages        : ${validatedLanguages.length > 0 ? validatedLanguages.join(", ") : "none"}`,
+  );
+  console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
+};
+
+main().catch((error) => {
+  console.error(error);
+  process.exit(1);
+});
diff --git a/packages/db/src/generating-decks.ts b/packages/db/src/generating-decks.ts
deleted file mode 100644
index 42e14dc..0000000
--- a/packages/db/src/generating-decks.ts
+++ /dev/null
@@ -1,162 +0,0 @@
-/*
- *
- * Builds the "top English nouns" deck from a curated wordlist of the 1000 most
- * frequently used English nouns. The deck has English as its source language —
- * meaning it was curated from an English-centric frequency list, and a separate
- * deck would be needed for other source languages. For each word in the list, all
- * matching term IDs are looked up in the database via the translations table
- * (language: "en", POS: "noun") — homonyms are intentionally included as separate
- * cards since the quiz UI displays a gloss alongside each word. Words from the
- * list that have no DB match are skipped and written to a file for future
- * reference. The script is idempotent: if the deck already exists, only terms
- * present in the source but missing from the deck are added; terms already in the
- * deck are left untouched; terms in the deck but absent from the source are never
- * removed. After resolving all matched terms, the script determines
- * validated_for_languages by checking which languages — excluding the source
- * language — have full translation coverage across all matched terms, and updates
- * the array on every run.
- */
-
-/*
- * roadmap
- *
- * [x] Setup — hardcoded path, name, description, source language, POS
- * [x] Read wordlist — load and deduplicate the 1000 nouns
- * [x] Query terms — match to database, collect all term IDs per word (including homonyms)
- * [x] Write missing words to file for future reference
- * [x] Determine validated_for_languages — find languages (excluding source) with full coverage across all matched terms
- * [ ] Check idempotency — if deck exists, diff matched terms against existing deck_terms
- * [ ] Create deck if it doesn't exist — insert with name, source_language, validated_for_languages
- * [ ] Add new terms — insert only term IDs present in source but missing from deck
- * [ ] Update validated_for_languages — recalculate and update on every run
- * [ ] Report — summary of words found, missing, added, and validated languages
- */
-
-import fs from "node:fs/promises";
-import { db } from "@glossa/db";
-import { translations, terms, decks } from "@glossa/db/schema";
-import { inArray, and, eq } from "drizzle-orm";
-import { SUPPORTED_LANGUAGE_CODES } from "@glossa/shared";
-
-const pathToWordlist = "./src/data/wordlists/top1000englishnouns";
-const nameOfDeck = "top english nouns";
-const descriptionOfDeck =
-  "Most frequently used English nouns for vocabulary practice";
-const sourceLanguage = "en";
-const sourcePOS = "noun";
-
-// new Set() automatically discards duplicate values,
-// and spreading it back with ... converts it to a plain array again.
-// So if "bank" appears twice in the file,
-// the resulting array will only contain it once.
-const readingFromWordlist = async () => {
-  const raw = await fs.readFile(pathToWordlist, "utf8");
-  const words = [
-    ...new Set(
-      raw
-        .split("\n")
-        .map((w) => w.trim().toLowerCase())
-        .filter(Boolean),
-    ),
-  ];
-  return words;
-};
-
-const checkingSourceWordsAgainstDB = async (words: string[]) => {
-  const rows = await db
-    .select({ text: translations.text, termId: translations.term_id })
-    .from(translations)
-    .innerJoin(terms, eq(translations.term_id, terms.id))
-    .where(
-      and(
-        inArray(translations.text, words),
-        eq(translations.language_code, sourceLanguage),
-        eq(terms.pos, sourcePOS),
-      ),
-    );
-
-  const wordToTermIds = new Map<string, string[]>();
-  for (const row of rows) {
-    const word = row.text.toLowerCase();
-    const existing = wordToTermIds.get(word) ?? [];
-    wordToTermIds.set(word, [...existing, row.termId]);
-  }
-  const termIds = Array.from(wordToTermIds.values()).flat();
-  const missingWords = words.filter((w) => !wordToTermIds.has(w));
-
-  return { termIds, missingWords };
-};
-
-const writeMissingWordsToFile = async (missingWords: string[]) => {
-  const outputPath = `${pathToWordlist}-missing`;
-  await fs.writeFile(outputPath, missingWords.join("\n"), "utf8");
-};
-
-const validateLanguages = async (sourceLanguage: string, termIds: string[]) => {
-  // create array of language code from the supported languages
-  // remove source language from it
-  const languages = SUPPORTED_LANGUAGE_CODES.filter(
-    (language) => language !== sourceLanguage,
-  );
-  const validatedLanguages: string[] = [];
-  // For each remaining language, count how many of the termIds have a translation in that language
-  for (const language of languages) {
-    const rows = await db
-      .select({ termId: translations.term_id })
-      .from(translations)
-      .where(
-        and(
-          inArray(translations.term_id, termIds),
-          eq(translations.language_code, language),
-        ),
-      );
-    if (rows.length === termIds.length) {
-      validatedLanguages.push(language);
-    }
-  }
-
-  // If the count equals termIds.length → full coverage → include in result
-  // Return the array of fully covered languages
-  return validatedLanguages;
-};
-
-const findExistingDeck = async () => {
-  const existing = await db
-    .select({ id: decks.id, validatedForLanguages: decks.validated_languages })
-    .from(decks)
-    .where(
-      and(
-        eq(decks.name, nameOfDeck),
-        eq(decks.source_language, sourceLanguage),
-      ),
-    );
-  return existing[0] ?? null;
-};
-
-const main = async () => {
-  // reading from source file
-  console.log("📖 Reading word list...");
-  const sourceWords = await readingFromWordlist();
-  console.log(`   ${sourceWords.length} words loaded\n`);
-
-  // checking if sourceWords exist in database
-  console.log("🔍 Checking against database...");
-  const { termIds, missingWords } =
-    await checkingSourceWordsAgainstDB(sourceWords);
-  console.log("words found in db: ", termIds.length);
-  console.log("words NOT found in db: ", missingWords.length, "\n");
-
-  // writing missing words to file
-  console.log("writing missing words to file...\n");
-  await writeMissingWordsToFile(missingWords);
-
-  // validating languages
-  console.log("validation languages...");
-  const validatedLanguages = await validateLanguages(sourceLanguage, termIds);
-  console.log("validated these languages: ", validatedLanguages, "\n");
-};
-
-main().catch((error) => {
-  console.error(error);
-  process.exit(1);
-});