YOU SAID:
Hey why dont we go to the park today?
INTO JAPANESE
ねぇ、今日は公園に行かない?
BACK INTO ENGLISH
Hey, do you want to go to the park today?
INTO JAPANESE
ねえ、今日公園に行きませんか?
BACK INTO ENGLISH
Hey, would you like to go to the park today?
INTO JAPANESE
ねぇ、今日公園に行きませんか?
BACK INTO ENGLISH
Hey, would you like to go to the park today?
That didn't even make that much sense in English.