Spain and Catalonia – Not Just a Language Conflict

Is Catalan in the Basque region? - Quora

Why speaking Spanish in Catalonia is controversial – Jem in Girona

Spain May End Catalan-Only Schools - Language Magazine

Spanish vs Catalan: Similarities and Differences

Spain and catalonia flags Royalty Free Vector Image

Intonational convergence in language contact: Utterance-final F0 contours in Catalan–Spanish early bilinguals, Journal of the International Phonetic Association

Census data on languages of Spain

Barcelona Blonde

The 6 (Surprising) Official Languages of Spain & How to Learn Them

Did you know that there are two languages (Catalan via Spanish; Cantonese via Mandarin) that can't be learned through the English version of Duolingo? : r/duolingo