This has been stated various times by now, but as there are many topics popping up it gets lost very fast.
For now there won´t be a translation. This game is in english though the devs are german because english is a much more common language. They have a tight budget so finishing the game first is their priority.
They do want to do a translation, but if and when this will happen is still open. Many texts are generated which makes a translation not easier. If there will be a translation it will most likely be a german one first as they stated.
"I am a Paladin!"
>OMG, Malthus, there are no damn paladins in Battle Brothers...<
"OK, OK! Then I´m a wrecked down minstrel drunkard pretending to be a paladin, singing so wrong in the midst of battle that even the undead run in fear... Better?!"