[WouterSpaak]

I would assume this is true. In French (where Airbus comes from) 'West' is called 'Ouest'. "5240O" would be a pain.

[mikl]

On the other hand, in Danish and Norwegian, East is "Øst", making slashed zeros awkward together with compass directions. Dotted zeros would be better.

[beojan]

English is the universal language of aviation, so I'd expect the displays would be in English only.