Glitch in immersion awards points to a different language tree. (or L25 in Irish / Turkish/ etc)
How do people get to level 25 so fast in languages with no immersion? Maybe a bug, maybe not but it is quite simple if all that counts is having more points. If you go to immersion in a language you have a high translation tier in and start translating an article, then switch your language to (lets say irish) then go back to the article (via the link in your activity stream) and complete the translation, all your points will go to your currently selected language instead of the language of the document. Voilà la tricherie!
I should add, I did not post this to encourage people to do it, more to expose how it is being done. My goal is to learn languages not score points so I will be doing it the old fashioned way. I should have level 25 in Irish sometime around 2050 ;)