I would also like to add that not having a language added could deter any native-speaking visitors. We have a process for adding new languages, but it is not always clear to new users/visitors to this site. If someone visits the site, and doesn't see their language here, more probably than not, they will not create an account here and not come back. Obviously, speakers of rarer languages will not flock to the site, but all it takes is one, in order to have a decent corpus of a language (as per Amastan with Berber, 123xyz with Macedonian, and sabretou with Marathi). Having more languages improves our odds.

I WOULD (in theory) like to see all six thousand odd languages here, though, in all honesty, it would be impossible to verify all activity in the lesser known languages, and easier for trolls to troll on this site. As it is, all the languages we have have plenty of resources. Though it is often impossible to know if a particular sentence is what a native speaker would say, we can definitely know if that sentence is indeed in the language it is supposed to be in and that, at the very least, makes grammatical/syntactical sense. I and several other dedicated users will continue to see to that.