YOU SAID:
you can't teach an old dog tricks
INTO JAPANESE
旧弊な人は新しい事になじめない。
BACK INTO ENGLISH
You can't teach an old dog new tricks.
INTO JAPANESE
旧弊な人は新しい事になじめない。
BACK INTO ENGLISH
You can't teach an old dog new tricks.
That didn't even make that much sense in English.