βαρβαρόγλωσσος
From LSJ
νέῳ δὲ σιγᾶν μᾶλλον ἢ λαλεῖν πρέπει → it's fitting for a young man to keep silence rather than to speak (Menander)
English (LSJ)
ον,
A = βαρβαρόφωνος, Sch.Lyc.276.
German (Pape)
[Seite 432] eine fremde Sprache redend, Schol. Lycophr. 276; das Griechische fehlerhaft sprechend, Strab. XIV p. 977.
Greek (Liddell-Scott)
βαρβᾰρόγλωσσος: -ον, = βαρβαρόφωνος, Τζέτζ. εἰς Λυκ. 276.
Spanish (DGE)
-ον
de lengua bárbara e.d. rebuscada e incomprensible de Licofrón, Sch.Lyc.277.