Sure you can. Why can't you help the chapters
draft their bylaws for
the general things that do not require specific legal knowledge of
that particular country? Surely ChapCom has a relatively standard
framework that they can provide for the chapters to modify as they
need. If not, that's a failure on the committee's part for not being
proactive enough.
From my experience with the (second) UK chapter, a
Wikimedia framework
would be pretty useless. Most of the governing documents of a
charitable organisation are determined by the relevant laws. We
started with a framework from the UK charity commission and modified
that to suit our needs, I would expect other countries to be similar.