change how? Better wait for the update so they will be properly handled when entering them in the new version. It will be a long manual task to add the non-latin titles, but it is not something that has to be done quickly, it will be done from time to time.
If non-admins want to help, I'll also give an explanation on how to submit me a list of changes for mass-update (to avoid posting comments on each movie).

Also there are buttons for admins to easily switch original<->alternative and international<->alternative titles, I'll explain it here later.