Don't try to remove language from themoviedb if it isn't in the list

couchpotato/core/media/movie/providers/info/themoviedb.py

@@ -54,7 +54,8 @@ class TheMovieDb(MovieProvider):
             languages.remove('en')
 
         # default language has a special management
-        languages.remove(self.default_language)
+        if self.default_language in languages:
+            languages.remove(self.default_language)
 
         self.languages = languages