mobile

I just built AOSP from source for my MTK6589 phone. This is my first time building android from scratch, luckily the rom is working great. The only problem I'm having is that there are some languages missing from it (probably changed by the original author of the source code).
How do I go about re-adding these languages?
Is there a config file I can edit before building the rom?

Any help would be greatly appreciated.