I recently finished "Control", and there's a major character who speaks significantly in finish idioms that were directly translated: "I can tell you are not a yesterday's grouse's son"[1] I definitely got most of it from context; "take them behind the sauna" isn't that different from "Take them out back", and it was a fun way to make the character "weird" (which is important for story reasons)

[1]https://www.reddit.com/r/controlgame/comments/d5f0ki/ahtis_i...