认证用英语翻译为"certification"。这个词来源于拉丁语"certificāre"，意思是"确认，证实"。

例句：

I have a certification in computer programming.

我有一个计算机编程认证。

The certification exam is difficult to pass.

这个认证考试很难通过。

The certification process can be long and tedious.

认证过程可能会很长乏味。