Thread:Support/Adding a language for translation

Hello, I'm a developer working on a wiki-dictionary for the Balinese language (using the latin alphabet), which doesn't yet seem to have a MediaWiki translation. We will need to make at least a superficial translation of the MediaWiki interface for the project and would be interested in contributing it to the translatewiki project. It doesn't seem to be available in the language selection here, so how does one go about contributing?