ICU collation tailoring is currently being introduced into MediaWiki to improve category sorting, see bug 43799 and change I838484b9a. We may be able to use the same code to improve term search, taking care of (some) transliteration of diacritics, etc.
Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=43799