How many official languages are in the EU?

none that I know of assuming countries which go to the trouble & expense of using multilingual sign posts only do that for official languages, try: Wales (welsh/english) Scotland (gaelic/english) Ireland (Gaelic/English) Belgium (french/flemish) Sud Tirol (german/italian) & obviously Switzerland (german/french/italian/romanish). I suspect Catalonia & the Basque region in Spain, & possibly Andora are multilingual as well. That's just a start...