åçčềñṭ ƒøłɖǐṅǧ --> accent folding
One area of internationalization that doesn't get enough attention is accent folding. In almost all cases in software written for "Western" languages, á should be equivalent to a, å, â, and so on, but by default we treat them as distinct.
Anywhere you apply case-folding: urls, search, autosuggest, usernames, sorting, etc, you should consider applying accent-folding too. This project contains implementations of the accent_fold function in several languages. If your language is not here, please consider writing one and posting a patch.
These details are provided for information only. No information here is legal advice and should not be used as such.