Filtering European ASCII characters

[AMJF]

@ohrenkino

That's right. Thank you.
Perhaps this is an idea:
If you know which characters are no diacritics and you remove them, then everything that is left, should be one of those characters that need a closer look.

"$if($eql($len($replace($lower(%title%),a,,b,,c,,d,,e,,f,,g,,h,,i,,j,,k,,l,,m,,n,,o,,p,,q,,r,,s,,t,,u,,v,,w,,x,,y,,z,0
,,1,,2,,3,,4,,5,,6,,7,,8,,9,)),$len(%title%)),1,0)" IS "1"

It does not consider any punctuation yet...

When I select the above only the first line is copied, and when I try to paste the second line onto the end of the first in the Mp3tag filter, it doesn't seem to work. Also, I'm sure that there's meant to be two commas between the z and the 0 - am I right? In any case, I tried that, and the best I could get was the titles with all numbers in them.