An ‘Installation allowance’ is a one-time payment paid to new employees of EU institutions that have had to change their place of residence. If the official is entitled to the household allowance (has a spouse or/and dependents), he/she will receive two months’ basic salaries. In all other cases the Installation allowance is equal to one basic salary.
to be honest this is crazy. I mean a need to get a 3rd language that is probably is useless…