CHAPTER 5 A group of languages that share a common origin but have since evolved into individual languages is a: A. dialect B. language family C. language group D. language branch A lingua franca is A. an English word that has entered the French language B.a language that is mutually understood by people who have different native languages C. an extinct language that has been revived an official language in a region of the world different from where the language originated A group of languages that share a common ancestor before recorded history is a: A. dialect B. language family C. language group D. language branch An isogloss is A. a form of a language spoken in a local area B. a collection of unique words C. a boundary between language regions D. all of the above