diff --git a/api/src/controllers/seed/index.ts b/api/src/controllers/seed/index.ts
index 467462da..8a5dac11 100644
--- a/api/src/controllers/seed/index.ts
+++ b/api/src/controllers/seed/index.ts
@@ -1,7 +1,7 @@
 import Elysia from "elysia";
 import { Movie, SeedMovie } from "~/models/movie";
 import { seedMovie, SeedMovieResponse } from "./movies";
-import { Resource } from "~/models/utils";
+import { Resource, validateTranslations } from "~/models/utils";
 import { comment } from "~/utils";
 import { KError } from "~/models/error";
 
@@ -14,6 +14,9 @@ export const seed = new Elysia()
 	.post(
 		"/movies",
 		async ({ body, error }) => {
+			const err = validateTranslations(body.translations);
+			if (err) return error(400, err);
+
 			const { status, ...ret } = await seedMovie(body);
 			return error(status, ret);
 		},
diff --git a/api/src/db/schema/shows.ts b/api/src/db/schema/shows.ts
index ce406f56..2f43e736 100644
--- a/api/src/db/schema/shows.ts
+++ b/api/src/db/schema/shows.ts
@@ -1,4 +1,4 @@
-import { sql } from "drizzle-orm";
+import { relations, sql } from "drizzle-orm";
 import {
 	check,
 	date,
@@ -108,3 +108,14 @@ export const showTranslations = schema.table(
 	},
 	(t) => [primaryKey({ columns: [t.pk, t.language] })],
 );
+
+export const showsRelations = relations(shows, ({ many }) => ({
+	translations: many(showTranslations, { relationName: "showTranslations" }),
+}));
+export const showsTrRelations = relations(showTranslations, ({ one }) => ({
+	show: one(shows, {
+		relationName: "showTranslations",
+		fields: [showTranslations.pk],
+		references: [shows.pk],
+	}),
+}));
diff --git a/api/src/index.ts b/api/src/index.ts
index 00f1b082..5fb5021f 100644
--- a/api/src/index.ts
+++ b/api/src/index.ts
@@ -12,6 +12,7 @@ import { videos } from "./controllers/videos";
 import { db } from "./db";
 import { Image } from "./models/utils";
 import { comment } from "./utils";
+import { base } from "./base";
 
 await migrate(db, { migrationsSchema: "kyoo", migrationsFolder: "./drizzle" });
 
@@ -37,6 +38,7 @@ if (!secret) {
 }
 
 const app = new Elysia()
+	.use(base)
 	.use(jwt({ secret }))
 	.use(
 		swagger({
diff --git a/api/src/models/utils/language.ts b/api/src/models/utils/language.ts
index 302e67f9..b843df0b 100644
--- a/api/src/models/utils/language.ts
+++ b/api/src/models/utils/language.ts
@@ -1,6 +1,28 @@
 import { FormatRegistry } from "@sinclair/typebox";
 import { t } from "elysia";
 import { comment } from "../../utils";
+import type { KError } from "../error";
+
+export const validateTranslations = <T extends object>(
+	translations: Record<string, T>,
+): KError | null => {
+	for (const lang of Object.keys(translations)) {
+		try {
+			const valid = new Intl.Locale(lang).baseName;
+			if (lang !== valid) {
+				translations[valid] = translations[lang];
+				delete translations[lang];
+			}
+		} catch (e) {
+			return {
+				status: 400,
+				message: `Invalid translation name: '${lang}'.`,
+				details: null,
+			};
+		}
+	}
+	return null;
+};
 
 FormatRegistry.Set("language", (lang) => {
 	try {
diff --git a/api/tests/seed-movies.test.ts b/api/tests/seed-movies.test.ts
index 1173116c..b3e1aba4 100644
--- a/api/tests/seed-movies.test.ts
+++ b/api/tests/seed-movies.test.ts
@@ -1,13 +1,15 @@
 import { afterAll, beforeAll, describe, expect, it, test } from "bun:test";
 import { eq, inArray } from "drizzle-orm";
 import Elysia from "elysia";
+import { base } from "~/base";
 import { seed } from "~/controllers/seed";
 import { db } from "~/db";
 import { shows, showTranslations, videos } from "~/db/schema";
+import { bubble } from "~/models/examples";
 import { dune, duneVideo } from "~/models/examples/dune-2021";
 import type { SeedMovie } from "~/models/movie";
 
-const app = new Elysia().use(seed);
+const app = new Elysia().use(base).use(seed);
 const createMovie = async (movie: SeedMovie) => {
 	const resp = await app.handle(
 		new Request("http://localhost/movies", {
@@ -157,6 +159,65 @@ describe("Movie seeding", () => {
 		expect(body.details).toBeObject();
 		// TODO: handle additional fields too
 	});
+
+	it("Invalid translation name", async () => {
+		const [resp, body] = await createMovie({
+			...dune,
+			translations: {
+				...dune.translations,
+				test: {
+					name: "foo",
+					description: "bar",
+					tags: [],
+					aliases: [],
+					tagline: "toto",
+					banner: null,
+					poster: null,
+					thumbnail: null,
+					logo: null,
+					trailerUrl: null,
+				},
+			},
+		});
+
+		expectStatus(resp, body).toBe(400);
+		expect(body.status).toBe(400);
+		expect(body.message).toBe("Invalid translation name: 'test'.");
+	});
+
+	it("Correct translations casing.", async () => {
+		const [resp, body] = await createMovie({
+			...bubble,
+			slug: "casing-test",
+			translations: {
+				"en-us": {
+					name: "foo",
+					description: "bar",
+					tags: [],
+					aliases: [],
+					tagline: "toto",
+					banner: null,
+					poster: null,
+					thumbnail: null,
+					logo: null,
+					trailerUrl: null,
+				},
+			},
+		});
+
+		expect(resp.status).toBeWithin(200, 299);
+		expect(body.id).toBeString();
+		const ret = await db.query.shows.findFirst({
+			where: eq(shows.id, body.id),
+			with: { translations: true },
+		});
+		expect(ret!.translations).toBeArrayOfSize(1);
+		expect(ret!.translations[0]).toMatchObject({
+			language: "en-US",
+			name: "foo",
+		});
+	});
+
 	test.todo("Create correct video slug (version)", async () => {});
 	test.todo("Create correct video slug (part)", async () => {});
 	test.todo("Create correct video slug (rendering)", async () => {});