Alternatively, in the languages I speak:
Welche Sprachen sprechen Sie? (Deutsch/German)
¿Qué idiomas habla usted? (Español/Spanish)
Quelle langue parlez-vous? (Français/French)
EDIT: These sentences are now up to date.
Alternatively, in the languages I speak:
Welche Sprachen sprechen Sie? (Deutsch/German)
¿Qué idiomas habla usted? (Español/Spanish)
Quelle langue parlez-vous? (Français/French)
EDIT: These sentences are now up to date.
It is indeed normal to use ‘du’ pretty much everywhere on the internet. Even in French i never see ‘vous’ (which to me feels more common than Sie in German usually).