YOU SAID:

Let the sleeping dogs lay

INTO JAPANESE

眠っている犬を横たえさせる

BACK INTO ENGLISH

make a sleeping dog lie down

INTO JAPANESE

眠っている犬を横にする

BACK INTO ENGLISH

Lay down a sleeping dog

INTO JAPANESE

眠っている犬を寝かして

BACK INTO ENGLISH

Put the sleeping dog to bed.

INTO JAPANESE

寝ている犬を寝かしなさい。

BACK INTO ENGLISH

Put the sleeping dog to bed.