Please respond to these definitions with a 2-3 sentence response for each. sociolinguistics dialect vernacular bio-program hypothesis minority language language families lingua franca Ebonics pidgin vs. creole language shift language planning indigenous language diglossia external vs. internal change colonial vs. immigrant languages bilingualism high vs. low language language maintenance domain official language language isolates lexifier language assimilation reanalysis genetically related languages protolanguage nation-state mother-daughter languages deficit theory Ebonics glottochronology matched-guise test