YOU SAID:
Can I have a hotdog with mustard please?
INTO JAPANESE
マスタード入りのホットドッグを頂けますか?
BACK INTO ENGLISH
Can you have a hot dog with mustard?
INTO JAPANESE
マスタード入りのホットドッグはありますか?
BACK INTO ENGLISH
Do you have a hot dog with mustard?
INTO JAPANESE
マスタード入りのホットドッグはありますか?
BACK INTO ENGLISH
Do you have a hot dog with mustard?
That didn't even make that much sense in English.