What European countries have a linguistic division?

Belgium is the most notorious case: linguistic division had led to a split of the country into two autonomous regions, Flanders (Dutch-speaking) and Wallonia (French speaking) and to much mutual dislike and mistrust. Spain is the other country where linguistic division has led to political division and unrest, especially in the Galician-, Basque- and Catalan-speaking regions.

Other European countries with distinct (but more peaceful) linguistic and regional divisions are Switzerland(French-German- Italian), Great Britain (English and Welsh and Gaelic), France (French and Basque), Hungary(Hungarian and 6 other languages, although Hungarian is the only official language). Italy also has an area speaking a decadent varient of Latin called Ladon in some Tyrol areas.