In translate() function, changed text to be translated in parameters dictionary to UTF-8 encoding. Conversion is needed to allow Japanese strings to be passed to urlencode().

Author: mwoodward

__init__.py

@@ -82,7 +82,7 @@ def translate(self, text, to_lang, from_lang=None,
             supported category is "general".
         """
         params = {
-            'text': text,
+            'text': text.encode('utf8'),
             'to': to_lang,
             'contentType': content_type,
             'category': category,