Question

How do you say "I need to use the restroom" in french?

Answer 1

Je dois aller aux toilettes.

Step-by-step explanation:

The trick is not to translate word by word but rather learn how different cultures express themselves.

Answer 2

'J'aimerais utiliser les commodités' or 'J'aimerais aller aux toilettes'

If you really want the infinite the concept of +'use' in your sentence then : 'J'ai besoin d'utiliser les toilettes'.