with the full unicode case folding this is possible:
regex.match(r"strasse", "straße", regex.V1 | regex.IGNORECASE)
However, these do not match:
regex.match(r"gehor", "gehör", regex.V1 | regex.IGNORECASE) regex.match(r"francois", "françois", regex.V1 | regex.IGNORECASE)
So I would really appreciate a flag, propably IGNOREACCENTS, that solves this problem. I also described it here: StackOverflow: Regex - match a character and all its diacritic variations (aka accent-insensitive)
Sorry if this is already possible and I just missed how.