langmuir equationlangsatlangstroth hivelanguagelanguage acquisitionlanguage acquisition devicelanguage acquistionlanguage acquistion devicelanguage acquistion theorieslanguage agnosticlanguage approach vs language methodlanguage artslanguage arts classlanguage as communicationlanguage attritionlanguage barrierlanguage boosterlanguage bossterlanguage boundarylanguage changelanguage codelanguage competencelanguage confederationlanguage contactlanguage deathlanguage developmentlanguage disorderlanguage dispersallanguage egolanguage exchangelanguage facultylanguage familylanguage fluencylanguage focuslanguage formlanguage functionlanguage functionslanguage identifierlanguage impairedlanguage impairmentlanguage institutelanguage lablanguage laboratorylanguage learnerlanguage learner زبان اموزlanguage learninglanguage losslanguage maintenancelanguage melodylanguage nonselective