I prefer the open source alternative Apertium.
For some languages the translations are good and anyone can help make it better.
Yes, but I think at the moment only one person is working on it, and it's fairly new. The project uses Apertium, but I don't know how far along it is at the moment.
If he wants to get in touch with me, just DM me and I can give you an email or something. :)