fix pt and nl mbart calls

app.py

@@ -112,6 +112,7 @@ async def translate(request: Request):
             if is_mbart:
                 # build e.g. "de_DE", "es_XX", etc.
                 lang_code = f"{target_lang}_{target_lang.upper()}"
+                if target_lang == "nl" or target_lang == "pt": lang_code = f"{target_lang}_XX"
                 bos_id    = tokenizer.lang_code_to_id[lang_code]
                 outputs = model.generate(
                     **inputs,