Update README.md

README.md

@@ -16,6 +16,7 @@ should probably proofread and complete it, then remove this comment. -->
 This model is a fine-tuned version of [google-bert/bert-base-multilingual-cased](https://huggingface.co/google-bert/bert-base-multilingual-cased) on an unknown dataset.
 It achieves the following results on the evaluation set:
 - Loss: 1.1971
+- Perplexity 3.31
 
 ## Model description