[jhgb]

I'm fairly sure this could be arranged for. As in, if there's too many of them belonging to the character set of a particular language, then it's very likely that it's simply a text in that language. But random characters in the middle of ASCII identifiers are probably not something that you want.

[robotmay]

Yeah I'm not opposed to adding highlighting to them, and we are investigating how to do it, but it was less clear-cut than the bidi characters (which are totally invisible when rendered). I think we'll want to make it a bit more configurable and probably a separate option to the one which highlights the bidi characters.