Please don't spread the myth of Western languages being encodable in ASCII, and don't pretend to support Unicode (or anything else than English) if you filter everything to ASCII.
The _only_ Western language that is encodable in ASCII is English.
Corollary: English is the only language that can be encoded in ASCII.
The other western languages have endless issues with text being encoded/stripped down to ASCII. e.g. French, Spanish, Portuguese, German...