YOU SAID:
Smooth seas don't make a good sailor
INTO JAPANESE
滑らかな海は良い船乗りにはなりません
BACK INTO ENGLISH
Smooth sea is not a good sailor
INTO JAPANESE
滑らかな海は良い船乗りではありません
BACK INTO ENGLISH
Smooth sea is not a good sailor
That didn't even make that much sense in English.