app/application/app/Http/Requests/Admin/Projects/ServiceTranslate/UpdateRequest.php

@@ -26,7 +26,7 @@ final class UpdateRequest extends FormRequest implements FormRequestDto
     {
         return [
             'language.*.id' => ['required', 'numeric', 'min:1'],
-            'language.*.code' => ['nullable', 'string', 'min:2', 'max:50'],
+            'language.*.code' => ['nullable', 'string', 'min:2', 'max:50', 'required_with:language.*.source_language_id'],
             'language.*.source_language_id' => ['nullable', 'numeric', 'min:1', 'different:language.*.id'],
         ];
     }