Enlightenment (theory of language) ; Grammatiken, historische; Grammars, historical; Historical grammars ; Historical lexicography ; Renaissance (theory of language) ; History of linguistics (19th century) ; History of linguistics (20th century) ; History of language ; Mundartforschung; Dialectology ; Klassisches Portugiesisch; Archaisches Portugiesisch; Classical Portuguese; Archaic Portuguese; Medium Portuguese; Português médio; Old Portuguese