I live in a place where there are a lot of cultural differences. So, I assume German may also have cultures or habit that may differ from mine and some that are the same. So, here are some questions about body languages:

1. Nodding means to agree in my place but it means to disagree in some places, what about in German?
2. What about head shake?
3. Are there specific words for those action? If I use schütteln for head shake, would it be correct as shaking hand also use the same word.

Thank you very much for the help!

I live in a place where there are a lot of cultural differences. So, I assume German may also have cultures or habit that may differ from mine and some that are the same. So, here are some questions about body languages:

1. Nodding means to agree in my place but it means to disagree in some places, what about in German?
2. What about head shake?
3. Are there specific words for those action? If I use schütteln for head shake, would it be correct as shaking hand also use the same word.