When language is a barrier in people’s communication then gesticulations can certainly help. However, we have to be careful with them as they can mean different things in different countries.
Here is a list where to avoid the most common hand gesticulations.
Inward-Facing Peace Sign (V-shape)
If you think that inward-facing peace sign means “peace, man “or “I’ll have to beers” everywhere you go then you’re wrong. In the UK or in Australia this sigh means you’re asking for trouble and it’s offensive.