like: die Toilette → →
die Toilette ☊ 
nhà vệ sinh ☊ 
☊ Weißt du, wo die Toilette ist? ☊ Anh có biết nhà vệ sinh ở đâu không? ☊ (Lektion 2, Nr. 14) Wo sind die Toiletten? ☊ Nhà vệ sinh ở đâu? ☊ (Lektion 120, Nr. 2321) I have to go to the bathroom (= use the toilet). ☊ bathroom ☊
There are toilets at both front and rear of the plane. ☊ rear ☊
Have you flushed the toilet? ☊ toilet ☊
I need to go to the toilet (= use the toilet). ☊ toilet ☊
Do you need the toilet? ☊ toilet ☊