Wikimedia Bugzilla is closed!

Most European languages use letters which not present in the standard ASCII set.

it would be IHMO very useful allowing a more elastic search, that is:
* ae, oe, ue for ä, ö, ü; for instance, Goedel for Gödel;
* ss for ß; for instance, Grossmann for Großmann;
* a, e, i etc. for à, á, â, è, é, ê, ì, í, î etc; for instance, geologie (and
gèologie) for géologie;
* n for ñ; for instance, Bunuel for Buñuel;
* o (don't know if it's the best letter) for ø; for instance, Kobenhavn for
København;
* aa for å; for instance, Aahrus for Århus;
* C (or a better choice) for Č; for instance, Cesky for Česky;
* maybe others that I don't know.

this would be useful for a number of reasons:
# most keyboard layouts lack some letters;
# there is a long lasting tradition, among internet users, to avoid nonASCII
characters for compatibility, and, therefore, the habit to use "semplified"
versions;
# some of the previous substitutions are officially accepted in printing
conventions: it's the case of the German ae, oe, ue, ss;
# often somebody doesn't know the exact spelling for a world in a foreign language;
# Google does it already! :P