Forums
-
- Forum
- Posts
-
- Installation
- 28,257
- Troubleshooting
- 61,768
- Themes
- 10,301
- Plugins
- 15,220
- Requests & Feedback
- 14,825
- Showcase
- 3,253
-
Maybe look for the usernames-i18n-fix plugin. It allows much more that underscores, but reading it and the place it hooks to, you may be able to craft something to your liking.
See also: WordPress.org • bbPress.org • BuddyPress.org • Matt • Blog RSS