Feature Request: Filter option matching diacritics or not

General Discussion
2

Here is someone who looked for non ASCII characters:
/t/12909/1

or this one by DetlevD: Unicode to ASCII

Or you could compare if the filename matches the format string that you used when creating the filename:
"$ifgreater($strstr($lower(%_filename%),$lower(%title%)),0,1,0)" IS "0"
(replace the %title% with the format string)