Premise: Brutus is a "cognomen" of the Roman "gens Junia", a prominent family of the Roman Republic. The plural of Brutus is "Bruti", and the vocative form is "Brute", as used in the quotation ""Et tu, Brute?"" ("you too, Brutus?"), from Shakespeare's play "Julius Caesar".
Hypothesis: The Shakespeare play "Julius Caesar" has at least one non-English line.