Substitution rule with non-ascii characters

[penguinkeeper]

It still goes against a lot of the core of the ruleprocessor and every one of the rules would have to be refactored and re-tested, certainly not an easy feat. Possible but not easy or fast. As previously mentioned, you can use a custom script or a pre-made thing like RuleProcessorY (https://github.com/0xVavaldi/ruleprocessorY) which is an external tool that supports multibyte rules already.
Couple of related bits of source code:
https://github.com/hashcat/hashcat/blob/.../inc_rp.cl
https://github.com/hashcat/hashcat/blob/...timized.cl