Proportion of People in Basque Country who are fluent speakers in Basque

Proportion of People in Basque Country who are fluent speakers in Basque

“This is the case in almost all mountanous regions. People are more isolated and form their own dialects because of that and take in less influences from elsewhere. Caucasus, Himalaya, Newguinea. Even the alps in a way, the most diverse range of german dialects is in the alps. However I am not sure what the exact geographic reason is the Basques are the only surviving Paleo-European language”–FloZone