"Where is your bathroom?"
Translation:Waar is jullie badkamer?
Would "Waar is je wc" also be accepted?
I am wondering because in English 'bathroom' is synonymous with 'toilet' or 'restroom.' For example, "I have to go to the bathroom" = "Ik moet naar de wc." If I'm at someone's home or at a restaurant and I ask someone "Where is your bathroom?" it's because I need to use their wc (and accompanying sink to wash my hands), not to use their shower or bathtub.
In American English it is synonymous to "toilet" indeed, hence wc is accepted.
I'm not native Dutch, but I can confidently answer this...
You would be understood, of course, but no.
Waar ligt je/jouw/jullie/uw _ _ _ is mainly used in reference to more abstract things like: ambitie, expertise, focus, grens, hart, interesse, kracht, motivatie, passie, prioriteit, succes, talent, voorkeur, waarde, etc.