Another complication not mentioned in the tweets is consonant gradation, in which the stem changes in dozens of ways when suffixed (examples: http://users.jyu.f

Another complication not mentioned in the tweets is consonant gradation, in which the stem changes in dozens of ways when suffixed (examples: http://users.jyu.fi/~pamakine/kieli/suomi/vaihtelu/astevaihtelu.html http://users.jyu.fi/~pamakine/kieli/suomi/vaihtelu/astevaiht...), which makes Finnish a lot less cleanly agglutinative than most other languages. It's not like it can't be done, but it's yet another step (find the likely split points, then try to undo the consonant gradation) and I'd imagine casual foreign researchers aren't going to bother.