What happens when Spanish institutions and businesses give translation contracts to relatives or to some guy in a bar who once went to London and only charges 0.05€/word
How to comply with Catalan language police regulations without spending anything
Over at Tot Barcelona, and one of many such cases in Barcelona. As is noted, there is no proof that the motivation is this rather than, say, a sudden rush of patriotic blood to the head of the proprietor. But, as is also noted, if your shop sign is in Arabic you will be left in peace, while lingua franca, Spanish signs attract heavy fines.