linguist

n.

1. Student of language

   etymologist, philologist, philologer, structuralist, structural linguist, usagist, transformationalist, transformational grammarian, phonologist, dialectician, vocabulist, glossographer, glossologist, phoneticist, phonetician, phonemist, grammatist, grammarian, lexiconist, lexicographer, philologue, linguistician, stratificationalist, stratificational grammarian, tagmemist, glottochronologist, comparativist, comparative (Indo-European) grammarian, reconstructionist, linguistic geographer, semanticist.

2. Speaker of many languages

   polyglot, translator, polyglottist, savant, conversant, Pangloss; see also scholar 2.