βαρβαριστί
From LSJ
μηδενί δίκην δικάσῃς πρίν ἀμφοῖν μῦθον ἀκούσῃς → do not give your judgement on anything until you have heard a speech on both sides
English (LSJ)
Adv.
A in barbarous fashion, Plu.2.336c. II in barbarian or foreign language, κεκράξονται β. Ar.Fr.79; ἀξύνετα βαρβαριστὶ παρακαλούντων App.Mith.50, cf. A.D.Adv.162.5.
German (Pape)
[Seite 432] auf barbarisch, in ausländischer Sprache, bes. persisch, Ar. frg. bei Phot.; Plut. u. a. Sp., wie App. Mithr. 50.