Today, most tribes across the country are making some type of effort toward a language comeback, according to Leanne Hinton, a Berkeley linguistics professor and board member of the Advocates for Indigenous California Language Survival.

NPR: To Save Endangered Languages, Tribes Turn To Tech

Estelle Irizarry, a linguistics professor at Georgetown University, has analyzed the language and syntax of hundreds of handwritten letters, diaries and documents of Columbus and concluded that the explorer's primary written and spoken language was Castilian Spanish.

CNN: Was Columbus secretly a Jew?