Looks very good.
Thanks.
Just a small spacing problem there
+# LangVariety <language_variety>
I noted that already, thanks.
Also you might want to remove the "RTL false" statements, assuming that
false is the default.
I thought about it, too. (I first worried this would look a bt LTR-centric;
but this is just the linguist's concern).
In the meantime, I have furthermore changed BabelPreamble to PostBabelPreamble
(to make clear this code is inserted after babel and assuming we might
introduce also a PreBabelPreamble [bug #4786])
Pavel, can I shove this in?
Jürgen