Localisation updates from https://translatewiki.net.

Change-Id: I0c3449cddc72ac937fd969556eb5d81bbd3940b9
Localisation updates from https://translatewiki.net.

Change-Id: I557a1febbb2e64098f946194c7e456728bf2f3c1
Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: I02a1c43b4b52466b82491e4dde94b24e68656c68