Even just a simple head movement depends on the culture, as nodding for "yes" and shaking the head for "no" is not universal [0][1]. And this doesn't even accou

Even just a simple head movement depends on the culture, as nodding for "yes" and shaking the head for "no" is not universal [0][1]. And this doesn't even account for something like the "indian head bobble". [2] Another example is the use of index finger and thumb to create an O. [3] So if these very simple examples depend on the culture, I expect signing to be much more localized. [0]: https://en.wikipedia.org/wiki/Nod_(gesture) https://en.wikipedia.org/wiki/Nod_(gesture) [1]: https://en.wikipedia.org/wiki/Head_shake https://en.wikipedia.org/wiki/Head_shake [2]: https://en.wikipedia.org/wiki/Head_bobble https://en.wikipedia.org/wiki/Head_bobble [3]: https://en.wikipedia.org/wiki/OK_gesture#Negative_connotations https://en.wikipedia.org/wiki/OK_gesture#Negative_connotatio...