Django reverse internalization/localization
Time zones is rather simple to implement. Simply use pytz and/or dateutil. Your question is quite broad, can you give an example of specific language issues you're facing?
This is quite different question. We have a django web application in an European language. Now we want same app in English language. 
I guess if I just follow the django internalization/localization steps in reverse order, I will be able to make the app in English (The original code was written by someone else). But I think this is not an optimal way to do it.Is there any better way or ways?
PS. local timezone will be India for now. We plan to add other countries as well in coming days.