YOU SAID:
Don't look a gift horse in the mouth, as they say, rather, count thy chickens before they hatch.
INTO JAPANESE
彼らと言う、むしろ、あなたの鶏を数えます孵化する前に、口の中で贈り物の馬を見ていません。
BACK INTO ENGLISH
They say, rather, count your chickens before they hatched, doesn't look a gift horse in the mouth.
INTO JAPANESE
彼らは孵化、口の中で贈り物の馬を見ていない前に、あなたの鶏をカウントではなく、彼らが言います。
You should move to Japan!