linguo-, lingu-, lingua-, -linguist, -linguistic, -linguistical, -linguistically +

(Latin: literally tongue; and by extension, speech, language)

From Old Latin dingua which is a cognate (kindred) with Old English tunge, The change of d (in Old Latin dingua) to l (in Latin lingua) was probably due to dialectal influence (the so-called "Sabine l"). It was facilitated by a folk-etymological association with lingere, "to lick", the tongue having been conceived as "the licking organ".

—According to Dr. Ernest Klein in his
A Comprehensive Etymological Dictionary of the English Language
Cross references of word families related directly, or indirectly, to: "talk, speak, speech; words, language; tongue, etc.": cit-; clam-; dic-; fa-; -farious; glosso-; glotto-; lalo-; locu-; logo-; loqu-; mythico-; -ology; ora-; -phasia; -phemia; phon-; phras-; Quotes: Language,Part 1; Quotes: Language, Part 2; Quotes: Language, Part 3; serm-; tongue; voc-.