So I guess these are the only options we want to have:

Demo wiki: $wgGroupPermissions['user']['editmyoptions'] = true;
Producer: $wgGroupPermissions['wikispeech-edit-lexicon']['wikispeech-edit-lexicon'] = true; or: $wgGroupPermissions['user']['wikispeech-edit-lexicon'] = true;

Yes, for editing. We still want to keep reading and listening permissions for everyone.

Producer: $wgGroupPermissions['wikispeech-edit-lexicon']['wikispeech-edit-lexicon'] = true; or: $wgGroupPermissions['user']['wikispeech-edit-lexicon'] = true;

I'd say the first since we have that specific group. Not sure that it'll make any difference at the moment, but could in the future.

The only thing I can find to remove in producer and demo wiki is this:

$wgGroupPermissions['user']['pagelang'] = true; otherwise it seems like the user did not have access to any other rights?

There are default values for group permissions: mw:Manual:User rights. You can also look at Special:ListGroupRights to see settings for that wiki.

Yes, thanks! Then I think this is done!

It looks like you locked down a bit too much. Now I can't edit or create pages as an admin 🙂 I think you may have to add the permissions you removed to the admin group.

Oh.. I had reset the user group's rights on the demo wiki using $wgGroupPermissions['user'] = []; to ensure ordinary users can't edit anything, so I think I removed it all..

To fix this, i guess for example these are needed for admin?:

$wgGroupPermissions['sysop']['edit'] = true;
$wgGroupPermissions['sysop']['createpage'] = true;
$wgGroupPermissions['sysop']['upload'] = true;
$wgGroupPermissions['sysop']['move'] = true;

I think that would work. There may be something in the documentation about doing something like this. It might be worth having a look if you haven't already.

Now it should finally work. From what I could read fro the documentation the way to go was to manually add the extra rights to the sysop when needed.

Yes, it works now.