Localisation updates from https://translatewiki.net.

Change-Id: I21541ff363c9cc30954d521f1638169d149b5726
Migrate to JSON i18n

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

Change-Id: I9a51713e5c8fa279a0014f003766b06b401d7e3f
Migrate to JSON i18n

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

Change-Id: Id52eb1877430516809b025bee3c458281257eba5