Helping us is very easy. We provide a list of open tasks we want to get solved. Before you jump on our wiki page, consider doing the following things before getting started:
Join our mailinglist at: https://lists.xcf.berkeley.edu/mailman/listinfo/gimp-docs/
Create a local working copy of gimp-help-2 for yourself.
$ git clone git://git.gnome.org/gimp-help-2