Yes and no. Yes if the libraries are written in Nim but no, when they are not. But: If they are written in Nim they can be both, snake_case or camelCase _because_ Nim makes no difference.
Also note that than Nim can import C libraries and use any identifier style you prefer anyway. The trade off is that you get a tiny bit more freedom in the case you don't like a Nim libraries style but you get uncertainty and confusion because the compiler does not differentiate. Maybe the difference in our points of view is due to you preferring more liberty (no matter whether it's actually useful) while I prefer safety and a compiler not playing tricks behind my back.
