YOU SAID:
Could I have milk with my coffee? コーヒーに牛乳を入れることはできますか?
INTO JAPANESE
コーヒーに牛乳を入れることはできますか?コーヒーに牛乳を入れることはできますか?
BACK INTO ENGLISH
Can I put milk in my coffee? Can I put milk in my coffee?
INTO JAPANESE
コーヒーに牛乳を入れてもいいですか?コーヒーに牛乳を入れてもいいですか?
BACK INTO ENGLISH
Can I put milk in my coffee? Can I put milk in my coffee?
That didn't even make that much sense in English.