Mainly homoglyphs. Characters that LOOK like Latin characters but aren't. Scammers register domains to make it look like at a glance you're visiting a reputable site.
It's why many browsers started defaulting to showing "xn--<whatever>" (punycode representation of IDN characters).
It sucks for domains that are emoji but whatevs. Scammers ruining things for everyone, as usual.
>>NetOpW+(OP)
Blocking domains with mixed character sets? Might be hard to come up with the rules.
But legit sites should stick to one language mostly.