Will it work?
Yes, if a Boyum product is not translated into a specific language it will instead run English.
How to get it translated?
If you are willing to help with the translation to an new language then please open a support ticket following the guidelines described here: https://support.boyum-it.com/hc/en-us/articles/360008061657-Guidelines-for-submitting-a-support-request . Please make sure you open your ticket as "Cosmetic Issue" with Normal priority. You will then be given instructions on how to perform the translation (varies a bit among the different products)