flu·ent Able to express oneself readily and effortlessly: a fluent speaker; fluent in three languages.
In non dictionary speak, I guess it would be "being able to express oneself in Finnish without conscious processing of the language beforehand"...
Practicing Finnish can be quite an experience. When I'm with my boyfriend's family practicing Finnish, they think I'm really funny because whenever I say a sentence in Finnish, I make this huge exhalation of breath afterwards, kind of like, "oh goody, made it through THAT sentence in one piece!" The funniest part about that was I didn't even realize that I did that until they giggled and pointed it out

Miksi leivänpaahtimissa on asetus, jolla leivän saa palaneeksi korpuksi, ettei sitä kukaan syö?