by 1944, from Italian linguine, plural of linguina "little tongue," diminutive of lingua "tongue," from Latin lingua "tongue" (from PIE root *dnghu- "tongue").
*dnghū-, Proto-Indo-European root meaning "tongue."
It is the hypothetical source of/evidence for its existence is provided by: Latin lingua "tongue, speech, language" (from Old Latin dingua); Old Irish tenge, Welsh tafod, Lithuanian liežuvis, Old Church Slavonic jezyku "tongue;" Old English tunge "tongue; speech."
Middle High Indian dialect used in sacred Buddhist writings (the lingua franca of northern India from c. 6c. B.C.E.-2c. B.C.E.), 1690s, from Sanskrit Pali, from pali bhasa "language of the canonical books," from pali "line; canon" + bhasa "language."