I run a board with Multisite. I have thinked to have a different language for board (10 boards), but my worry is that if i have more languages created (not selectable, for every board 1 different language) there can be performance issues. I need to have different language because to customize some things (like Credits, Terms etc.) i have to change phrases and i want to have these unique for board. Also, i have the same worry for styles...1 style for board (7 boards in total in an unique installation).