Shaking your head for 'No' is not universal.

以摇头表示“不”，并非放诸四海而皆准。

《牛津词典》

If you keep shaking your head saying, I can't do it.

如果你摇动你的头说：我不能这样做。

youdao

You just keep shaking your head in confirmation and acceptance.

你不停地点头表示确定和接受。

youdao

Is that what you're shaking your head about, Nicola?

这就是你摇头的原因吗，妮可拉？

耶鲁公开课 - 公正课程节选

It involves shaking your head.

这包括摇头的动作。

Don't 课堂 - SpeakingMax英语口语达人

This is both a fascinating read and one that will have you shaking your head.

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It is hard not to look back on the mood in 2008 without shaking your head slightly.

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If you are shaking your head in disbelief, so was I until it arrived and I set it up and started drinking the coffee.

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