English

interspeaker

From inter- + speaker.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Germanic *sprekô

Old English speca

Middle English speker

Today it means

adj Between speakers of a language.

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

Etymograph / interspeaker