YOU SAID:
You shall never defeat me!
INTO JAPANESE
決して私を敗北しなければならない!
BACK INTO ENGLISH
Must never defeat me!
INTO JAPANESE
決して私を倒す必要があります!
BACK INTO ENGLISH
You must never destroy me!
INTO JAPANESE
あなたは決して私を破壊しなければならない!
BACK INTO ENGLISH
You must never destroy me!
That didn't even make that much sense in English.