@natty still the same issue

@natty thanks, but these match any line with at least two colons in it. I added some info to the OP

What exactly is being matched doesn't matter as long as the match is in the correct line. This is for a Vale rule. So all the info I'm trying to get is "there's something wrong with the syntax in this line, please double check and fix"

I've been trying to find a solution for hours and I can't figure it out

Is there regex that matches an even number of occurrences of : in a single line

Edit: elaborating on the exact problem. Here's what I'm trying to do:

The closest match in terms of regex flavor is Golang

@anarchiv *waking up while Sunn O))) is playing* hey why are my neighbors drilling into the concrete wall at this hour again