-1. update the POT file and the PO files for the supported languages,
- before putting them under version control
-2. trigger a refresh of the corresponding HTML slave pages
+1. updates the POT file and the PO files for the supported languages
+ (this is done in the `needsbuild` hook); the updated PO files are
+ then put under version control
+2. triggers a refresh of the corresponding HTML slave pages (this is
+ achieved by making any "slave" page dependent on the corresponding
+ "master" page, in the `needsbuild` hook)