there are a [few](https://github.com/mozilla/zamboni/blob/master/mkt/lookup/templates/lookup/emails/refund-pending.txt). we need to localise all of our existing, unlocalised emails. this was blocked on saving the user's most recently used language in the database (which was [bug 833049](https://bugzilla.mozilla.org/show_bug.cgi?id=833049)).