diff --git a/TTS/api.py b/TTS/api.py
index f741f65f..abe9c56b 100644
--- a/TTS/api.py
+++ b/TTS/api.py
@@ -97,7 +97,7 @@ class TTS(nn.Module):
             isinstance(self.model_name, str)
             and "xtts" in self.model_name
             or self.config
-            and ("xtts" in self.config.model or len(self.config.languages) > 1)
+            and ("xtts" in self.config.model or "languages" in self.config and len(self.config.languages) > 1)
         ):
             return True
         if hasattr(self.synthesizer.tts_model, "language_manager") and self.synthesizer.tts_model.language_manager: