Many of the states don't have official languages either and of those that do several are bi-lingual. I grew up in Maine which doesn't have an official language

Many of the states don't have official languages either and of those that do several are bi-lingual. I grew up in Maine which doesn't have an official language but has a de-facto standard of English and French. The northern parts of the state have a very heavy french canadian influence and several towns use French more than English in signage as well as orally.