Earlier quoted context omitted.
How is Basque "politically controversial"? It is an official language in the Basque Autonomous Community of Spain. Turkish is also a minority language in Greece. It doesn't have official status, but they have their own government mandated Turkish-language schools.
Which brings up an interesting point. What makes a language european? English, French, etc are official languages in many african and asian colonies due to conquest. Does it make french and english asian or african language? Is russian an asian language or a european language?
That one's simple: it's a native language in a European country.
> Does it make french and english asian or african language?
No, since the official language is not the native language of and in these countries. Afrikaans, on the other hand is an African language, though it originated from (and is still very close to) Dutch.
> Is russian an asian language or a european language?
Russian is still a European language, despite most of Russia being located in Asia. The Asian parts of Russia have their own regional native languages (35 or so in total), with more than 20 official ones.