YOU SAID:
Hey boys, it's a spy!
INTO JAPANESE
ちょっと男の子、それは、スパイです!
BACK INTO ENGLISH
Little boy, it's a spy!
INTO JAPANESE
小さな男の子が、それは、スパイです!
BACK INTO ENGLISH
Boy it is a spy!
INTO JAPANESE
少年スパイです!
That didn't even make that much sense in English.