How can I add my language?

The main thing we use for each language in MOLTO is a resource grammar, which is actually a software library that defines the grammatical rules of the language: its word inflection and syntactic structures. Writing a resource grammar for a new language requires an effort of 3--6 months from a reasonably skilled programmer with good theoretical and practical knowledge of the language. Hence, if you want to make your language available in MOLTO, you should check out the GF Resource Grammar Project (this web page collects information used in currently on-going projects).