Is there a way to use question mark in my proc names?

[haxscramper_]

Sure, you can use 
<https://nim-lang.org/docs/manual.html#lexical-analysis-stropping> to use any 
combinations of characters as proc name. For example:
    
    
    import std/strutils
     
     proc `youOk?`(message: string): bool = not ("penis" in message)
     
     echo `youOk?`("some message")
    
    Run