We should note that preferredUsername, defined in ActivityPub, can include non-ASCII characters. For historical reasons, "usernames" have often had a limited range (lowercase alphanum), so implementers may make assumptions about this property that limit its use.
We should note that
preferredUsername, defined in ActivityPub, can include non-ASCII characters. For historical reasons, "usernames" have often had a limited range (lowercase alphanum), so implementers may make assumptions about this property that limit its use.