Update wording around model types

Author: lilkraftwerk

api-reference/translate.mdx

@@ -212,7 +212,7 @@ Note that we do not include examples for our client libraries in every single se
   When the `model_type` parameter is set, the response includes a `model_type_used` field indicating which model was used.
 
   <Warning>
-    To ensure accurate automatic language detection, the API uses next-gen models for all requests that omit `source_lang`, regardless of `model_type`. If your source language is known, you can specify `source_lang` to allow `latency_optimized` models to be used where available for your language pair. See [supported languages](/docs/getting-started/supported-languages) for language-specific model availability.
+    To ensure accurate automatic language detection, the API uses next-gen models for all requests that omit `source_lang`, regardless of `model_type`. If your source language is known, you can specify `source_lang` to allow classic models to be used where available for your language pair. See [supported languages](/docs/getting-started/supported-languages) for language-specific model availability.
   </Warning>
 
   <Info>