diff --git a/translate/provider/google.py b/translate/provider/google.py
index 7923bca..7947c50 100644
--- a/translate/provider/google.py
+++ b/translate/provider/google.py
@@ -74,7 +74,7 @@ def is_supported_language(self, code: str) -> bool:
         return code.lower() in self.supported_languages.keys()
 
     def get_language_name(self, code: str) -> str:
-        return self.supported_languages[code]
+        return self.supported_languages[code.lower()]
 
 
 make_translation_provider = GoogleTranslate