rustamabd at gmail dot com (2009-03-07 13:33:00)

The GNU gettext library works on a per-process, not per-thread basis. This means that in a multi-user setting such as the Apache web server it will only work with a prefork MPM (i.e. one process per user). Worker and other threaded MPMs will not work.
In addition, many users control GNU gettext by setting system environment variables such as LANG. This is not a good solution for a web server environment due to an obvious race condition.