diff --git a/src/lib/server/tts/generate.ts b/src/lib/server/tts/generate.ts
index bbbbd48..0b2f719 100644
--- a/src/lib/server/tts/generate.ts
+++ b/src/lib/server/tts/generate.ts
@@ -521,7 +521,6 @@ async function addReplicateLanguageInput(
   input: Record<string, unknown>,
   request: ResolvedServerTTSRequest,
 ): Promise<Record<string, unknown>> {
-  if (!request.language) return input;
   if (request.model === REPLICATE_KOKORO_82M_VERSIONED_MODEL) {
     const languageCode = resolveReplicateKokoroLanguageCode({
       language: request.language,
@@ -532,6 +531,7 @@ async function addReplicateLanguageInput(
     }
     return input;
   }
+  if (!request.language) return input;
   const languageInput = await resolveReplicateLanguageInput({
     provider: 'replicate',
     model: request.model as string,
diff --git a/tests/unit/tts-generate.vitest.spec.ts b/tests/unit/tts-generate.vitest.spec.ts
index d5e79ec..e32f6d3 100644
--- a/tests/unit/tts-generate.vitest.spec.ts
+++ b/tests/unit/tts-generate.vitest.spec.ts
@@ -105,5 +105,20 @@ describe('Replicate language schema values', () => {
       voice: 'bf_emma',
       language_code: 'b',
     });
+
+    await expect(buildReplicateInput({
+      text: 'Hello world',
+      voice: 'af_sarah',
+      speed: 1,
+      format: 'mp3',
+      model: REPLICATE_KOKORO_82M_VERSIONED_MODEL,
+      provider: 'replicate',
+      apiKey: 'r8_token',
+      testNamespace: null,
+    })).resolves.toEqual({
+      text: 'Hello world',
+      voice: 'af_sarah',
+      language_code: 'a',
+    });
   });
 });