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
longilingual
Having a long tongue.
mesiolingual
A reference to or formed by the mesial and lingual surfaces of a tooth, or the mesial and lingual walls of a tooth cavity preparation.
metalanguage
a language or system of symbols used to describe or analyze another language or system of symbols.
metalinguistics
1. The branch of linguistics that deals with the study of metalanguages.
2. The branch of linguistics that deals with the relation between a language and other aspects of a particular culture.
monolingual, monolingualism
1. Able to speak only one language.
2. Written, spoken, or produced in only one language.
multilingual, multilingualism, multilingually
1. Able to speak more than two languages fluently.
2. Written in, expressed in, or using more than two languages.
neurolinguistics
1. The science concerned with the neural mechanisms underlying the comprehension, production, and abstract knowledge or spoken, signed, or written language.
2. The branch of linguistics that explores how the brain encodes language.
3. The branch of medical science concerned with the neuroanatomical basis of speech and its disorders.
obtusilingual
Short- and blunt-tongued.
omnilingual
Speaking or understanding all languages.
orolingual
Of or relating to the mouth and the tongue.
prelingual
Occurring before the development of language.
psycholinguistic
A reference to psycholinguistics.
psycholinguistics
1. The study of linguistics as it relates to human behavior.
2. Study of a host of psychological factors associated with speaking; including voice, attitudes, emotions, and grammatical rules, that affect communication and tunderstand, predict, and often to change the behavior of living organisms, with a particular emphasis on human behavior in its origins, development, and expression during the lifetime of the individual.relating to psychology.
quadrilingual
Using, written in, etc., four languages.
Quot linguas calles, tot homines vales.
As many languages as you know, so many separate individuals you are worth.

You are worth as many different people as the number of languages you know. Attributed to Charles V, Holy Roman Emperor.

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-.