在英语中，当一个人的英文发音不准确时，可以用"mispronunciation"来表示。这个词是由"mis-"和"pronunciation"两个词组成的，"mis-"是一个前缀，意思是"错误地"，"pronunciation"是"发音"的意思。

例句：

My mispronunciation of that word made my teacher very frustrated.
(我把那个单词拼错了，我的老师很沮丧。)

I noticed that you had a spght mispronunciation of the word "menu."
(我注意到你在发音"menu"这个单词时有一点点不准。)

She had a lot of trouble with mispronunciation when she was learning Engpsh as a second language.
(她在学习英语作为第二语言时，发音有很多问题。)