you can select languages in control panel. Oly english is default available. You need to made your own languages or get languages from other user. There is a forum to share languages.

No more switching languages per user frown

https://www.ubbcentral.com/forums/ubbthreads.php/ubb/showflat/Number/1432/page/3#Post1432

my board: http://www.dragonclan-forum.de
my hobby: http://www.biker-reise.de
Ich kann bei Fragen zu UBBthreads in Deutsch weiterhelfen oder es zumindest versuchen