Question

How do you say can I go to the bathroom

Answer 1

Depends on what you mean

Explanation: If you want to go to the public restroom than you would say où sont les toilettes, s’il vous plaît , where are the toilets, please?. If you want to use the bathroom in someone else place than you would say puis-je utiliser vos toilettes , may I use your toilets?

Answer 2

Spanish: Puedo ir al baño

French: Je peux aller à la salle de bain

Chinese: 我可以上个洗手间吗

Russian: могу я пойти в ванную

Latin: possumne ire ad banum

Japanese: お手洗いに行ってもいいですか

You're welcome :)