Etymology tree Proto-Indo-European *dn̥ǵʰwéh₂s Proto-Italic *dn̥ɣwā Latin dingua Latin lingualbor. Esperanto lingvo Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -ārius Latin -ariumder. ▲ Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Gothic -𐌰𐍂𐌴𐌹𐍃 (-areis)bor. Proto-Slavic *-ařь Russian -арь (-arʹ)der. Esperanto -aro Esperanto lingvaro From lingvo (“language”) + -aro…