languageyoudaoicibaDictYouDict[language 词源字典]
language: [13] Like English tongue, Latin lingua ‘tongue’ was used figuratively for ‘language’; from it English gets linguist [16] and linguistic [19]. In the Vulgar Latin spoken by the inhabitants of Gaul, the derivative *linguāticum emerged, and this became in due course Old French langage, source of English language. (The u in the English word, which goes back to the end of the 13th century, is due to association with French langue ‘tongue’.)
=> linguistic[language etymology, language origin, 英语词源]
language (n.)youdaoicibaDictYouDict
late 13c., langage "words, what is said, conversation, talk," from Old French langage (12c.), from Vulgar Latin *linguaticum, from Latin lingua "tongue," also "speech, language" (see lingual). The form with -u- developed in Anglo-French. Meaning "a language" is from c. 1300, also used in Middle English of dialects:
Mercii, þat beeþ men of myddel Engelond[,] vnderstondeþ bettre þe side langages, norþerne and souþerne, þan norþerne and souþerne vnderstondeþ eiþer oþer. [John of Trevisa, translation of Bartholomew de Glanville's "De proprietatibus rerum," 1398]


In oþir inglis was it drawin, And turnid ic haue it til ur awin Language of the norþin lede, Þat can na noþir inglis rede. ["Cursor Mundi," early 14c.]
Language barrier attested from 1933.