If you are working on a multilanguage website, and you want to use Mosaik, you'll surely need to enable i18n_mosaik.
Traslating a Mosaik is ... (please don't say "really similar" again!!)... ...so easy!! :D

Just look at these screenshot:

So..that's all you need to know about Mosaik.

Drupal 8 version of this project is under active development and will be released in a couple of months ( we hope :) )