Etymon
en-artistic-protoindoeuropean-dnghweh2s-protoitalic-denwa-latin-dingua-latin-lingua-protoindoeuropean-h2-protoindoeuropean-eh2-protoindoeuropean-tos-protoindoeuropean-eh2tos-protoitalic-atos-vulgar-latin-atus-vulgar-latin-icus-vulgar-latin-aticus-vulgar-latin-aticum-vulgar-latin-linguaticum-old-french-languagebor
A dedicated page for this root is on the way — it will gather every word descended from it, sibling forms across daughter languages, and a branching map of the family tree.