A group that spoke this non-English language names the paradox that languages can be both similar enough to translate but different enough to be mutually unintelligible. This language is the most widely spoken that features classificatory verb stems based on whether the object is one of several types, including “Flat Flexible Object” and (15[1])“Mushy Matter.” The only word in this language that has been fully absorbed into English is this language’s term for home, hooghan. (15[1])Edward Sapir (-5[1])coined the name of a family whose most spoken language is this one by adding the prefix (*) “Na” to its endonym. Almost half of all native language speakers in the United States speak this most-spoken Athabaskan language, which is mutually intelligible with Apachean languages. For 10 points, speakers of what Native American language were employed as “code talkers” in World War II? ■END■ (10[1])