- www/<lang>/share/sgml/templates.usergroups.xsl:
customization layer for each language.
- www/<lang>/share/sgml/usergroups.xml:
translation of www/share/sgml/usergroups.xml. The translation teams
can simply copy it from the language-independent directory and keep
the translated items only; items which are not in the translated
file are automatically inserted from the original file on the
fly (so old items in the translated file are harmful).
