Hawaiian
On six of the seven inhabited islands of Hawaii, Hawaiian was displaced by English and is no longer used as the daily language of communication. The one exception is Niʻihau, where Hawaiian has never been displaced, has never been endangered, and is still used almost exclusively. Native speakers of Niʻihau Hawaiian speak among themselves in a way significantly different from the Hawaiian of the other islands—so different that it is unintelligible to non-Niʻihau speakers of Hawaiian.
Efforts to revive the language have increased in recent decades. Hawaiian language immersion schools are now open to children whose families want to retain (or introduce) Hawaiian language into the next generation. The local NPR station features a short segment titled "Hawaiian word of the day". Additionally, the Sunday editions of the Honolulu Star-Bulletin feature a brief article called Kauakukalahale, written entirely in Hawaiian by a student.
Read more about this topic: List Of Revived Languages