Are there examples of successful communities where second and third generation immigrants didn't adopt the dominant language in their region, or country?
Coming from South Africa, where there are eleven official languages [1], but English is the de-facto language for communication, it seems like having people not able to have a common language for communication is a recipe for balkanisation, ghettoisation, fragmentation and general strife.
[1] South Africa has eleven official languages, mostly because that was part of the cost of getting conservative Afrikaans speakers to accept the end of apartheid. Even today, they are the firmest proponents of multilingualism.
Coming from South Africa, where there are eleven official languages [1], but English is the de-facto language for communication, it seems like having people not able to have a common language for communication is a recipe for balkanisation, ghettoisation, fragmentation and general strife.
[1] South Africa has eleven official languages, mostly because that was part of the cost of getting conservative Afrikaans speakers to accept the end of apartheid. Even today, they are the firmest proponents of multilingualism.