Greengrocer's apostrophe arrives in Spain

Peter writes:

The grocer's apostrophe has arrived in real Spain, Spanish Spain.
This is surprising as the Spanish do not use it at all - not for possessives and not for elisions. This picture was shot in Sanlúcar, Cádiz province - most definitely a Brit-free zone.
There are plenty stray apostrophes on the Costas [or should I say Costa's] where they offer paella and chip's and tortilla and chips'; but the only English spoken in these parts is by the Spanish sherry families who speak it with Harrovian or Eton accents and certainly know where to put their apostrophes.