English

ethnogrammar

From ethno- + grammar.

Ancient Greek ἔθνος ‘a company, later a people, nation’

Proto-Indo-European *gerbʰ- ‘to carve, scratch’

…

Latin grammatica

Vulgar Latin *grammāria

Old French gramaire ‘classical learning’

Middle English gramere

Today it means

noun The branch of ethnolinguistics dealing with grammar.

Language periods are conventional ranges, not dates for this word.

Etymograph / ethnogrammar