wesalius both my wikis are accesed only locally.
Really? You use DokuWiki on a Stick... You can also take that literally.
The question of how to sync multiple DokuWiki instances is a recurring topic. For example, here.
And there are many ways and tools to synchronise files in general.
Basically, the simplest solution is to work together from several places with the same wiki instance. This group work is the central function of a wiki and therefore this is best supported.
Of course, somewhat tedious you can also sync with text files, a USB stick and the clipboard...
But because all ways have their advantages and disadvantages, and there may be certain ideas and restrictions, everyone has to find their own solution (as you can see from your example).
- Michael Sy.