It was commonly done at the time by having people with different accents. See the queen’s Latin trope. It would not be any weirder intrinsically, we’re just not used to it.
Done to (arguably) comic effect in the BBC sitcom 'Allo 'Allo!, about the French Resistance in WW2, where English, French and German are all indicated by outrageous caricatures of the relevant accents.
> people with different accents
Done to (arguably) comic effect in the BBC sitcom 'Allo 'Allo!, about the French Resistance in WW2, where English, French and German are all indicated by outrageous caricatures of the relevant accents.