YOU SAID:
please do not use this washroom
INTO JAPANESE
この洗面所は使用しないでください
BACK INTO ENGLISH
do not use this washroom
INTO JAPANESE
この洗面所は使わないでください
BACK INTO ENGLISH
don't use this washroom
INTO JAPANESE
この洗面所は使わないでください
BACK INTO ENGLISH
don't use this washroom
That didn't even make that much sense in English.