The Hawaiian Language
It has two official languages: English and Hawaiian. Hawaiian Creole English (or pidgin) is used by many residents of the state, either as a native or second language. The Hawaiian language experienced a resurgence since the late 20th Century, with immersion schools and a campus of the University of Hawaii teaching in the language. However according to Keola Donaghy in an interview with Indigenous Tweets, the number of speakers has now reached a plateau of around 10,000 people.
Donaghy is a non-native speaker but has done a lot of work to promote the language, including working on the Google search interface in Hawaiian. He has a vision that people will be able to use technology in Hawaiian. Read the rest of his interview, and view links to Hawaiian language resources here.