bilingual, dialectician, diglot, etymologer, etymologist, glossarist, glossographer, grammarian, grammaticaster, grammatist, lexicographer, lexicologist, linguistic scholar, linguistic scientist, linguistician, multilingual, orthoepist, paleographer, philologaster, philologer, philologian, philologist, phonemicist, phonetician, phoneticist, phonologist, polyglot, semanticist, semasiologist