@socu ,
It would make sense if there were an “accent-insensitive” flag in the standard regex engines, just like there’s “case-insensitive” flag. But no regex engine that I’ve ever used has had such a flag… Given that some of those engines have decades of development (for example, the Boost regex engine used by Notepad++ was derived from the PCRE engine, which had its roots in late-90s Perl regular expression), most of which has included knowing about Unicode, and the number of times I’ve seen “is there an accent-insensitive flag for regex-flavor-X” questions answered in the negative in programming forums, I would assume that if it were technically reasonable to be included, it would have been developed and included in the major ones by now. Given that it hasn’t been developed, I am assuming that’s because there’s a huge technical roadblock that’s beyond my pay grade to understand.