Update codebleu.py

codebleu.py

@@ -113,7 +113,7 @@ class codebleu(evaluate.Metric):
         return self.codebleu_package.calc_codebleu(
             references=references,
             predictions=predictions,
-            lang=lang[0],
+            lang=lang,
             weights=weights,
             tokenizer=tokenizer,
         )