Does the openstack-manuals project allow a big refactoring in **stable** branches?

I saw a big refactoring on the networking guide was merged in the master branch

and it was backported into stable/mitaka branch.

As a result of the backport, 25% of Japanese Mitaka Networking Guide translation.

I was really shocked that such thing happened in a stable branch.

If the project allows such backport, translators will easily lose their translation

and it implicitly means the project suggests not to translate it.

I would like to know the policy of the docs stable branch maintenance.

Akihiro