[johnhiler]

According to Sam, bbPress supports unicode display names, not unicode usernames:

https://bbpress.org/forums/topic/check-out-this-very-nice-r-t-l-arabic-bbpress

There are some discussions over possible plugins solutions (and related security risks!) here:

* https://bbpress.org/forums/topic/diacritic-letters-i-username-like-goran

* https://bbpress.org/forums/topic/accents-in-username