坏孩子的英文翻译是"naughty child"或"mischievous child"。这两个词的来源都源于拉丁语，"naughty"来源于拉丁语"naught"，意为"无价值的"；"mischievous"来源于拉丁语"mischievous"，意为"淘气的"。

例句：

He was a very naughty child and always got into trouble. 他是个很坏的孩子，老是惹麻烦。

She was a mischievous child and loved to play practical jokes on her siblings. 她是个淘气的孩子，喜欢捉弄她的兄弟姐妹。