I would love to see discourse get localized into kiswahili and other commonly used African languages.
Do note that lots of languages are already supported out of the box - just look in your admin settings for language to enable them. These can live together on the same instance. You set one as the default.
There is also a fairly amazing plugin providing automatic translation so people can translate posts into their own preferred interface language. We use it very actively on our community and it works surprisingly well even if the translations are a bit funny sometimes. 