Bilingualism can be divided into many groups, my fear as a Turkish-speaker is if we are forced to form a country with the G/C against our will, then that we may get a situation of subtractive bilingualism, and or covert bilingualism.
I seriosly doubt there will ever be "societal" bilingualism, as G/C generally do not want to learn Turkish and have no interest at all in it.
Types of Bilingualism
Covert Bilingualism
Where one language is concealed (for fear of discrimination etc.)
Ascendant Bilingualism
Where proficiency increases as a result of second language acquisition. Opposite to regressive bilingualism.
Additive Bilingualism
Second language is acquired without any detriment to the speaker’s native language.
Subtractive Bilingualism
Second language is acquired and the speaker’s native language deteriorates.
Societal Bilingualism
Some countries are officially bilingual. E.g. Finland (Finnish and Swedish), Canada (English and French). However, this status does not necessarily mean that there is widespread individual bilingualism.