Unfortunately, when testing on a fresh b2, I got the same result as you. Previously I tested on my main partition, and the fact that I can check quite a few boxes there is probably because I have had quite a few languages installed there for testing purposes. Besides, input methods etc. are not installed even when checked. (When starting l-s next time, other boxes than the translation box are unchecked again.)
Unfortunately, when testing on a fresh b2, I got the same result as you. Previously I tested on my main partition, and the fact that I can check quite a few boxes there is probably because I have had quite a few languages installed there for testing purposes. Besides, input methods etc. are not installed even when checked. (When starting l-s next time, other boxes than the translation box are unchecked again.)
This is a rather serious issue, right?