I can't speak for everyone, but I can speak for myself.

我不能代替每个人说话，但我可以代表我自己。

youdao

There is this include which allows me to include code, source code so to speak that other people wrote so I don't have to figure out for myself how to print things to the screen.

这个“include“可以让我加进一些代码来，比方说其他人写的源码,这样我就不用自己解决,如何在屏幕上输出了，别人已经为我解决这个问题。

哈佛公开课 - 计算机科学课程节选

Well, I can only speak for myself, but I certainly will never forget him.

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If I can no longer speak for myself, please keep me comfortable.

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"Senator, I'll speak for myself on this, " Jones answered.

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