Localisation updates from https://translatewiki.net.

Change-Id: I5457a0df3d173ee47ac4df0cce21f7b705993aab
Localisation updates from https://translatewiki.net.

Change-Id: Iebd770a0e3d70a20a18e0530a5dec6dd48d77650
Migrate to JSON i18n

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

Change-Id: Ib15dcc1771dd804e1488c95f1fcabe406f31e46e
Remove zh-[cn|tw] in favour of zh-han[s|t]

Change-Id: I17c4ab5bc8a44142d4afc4153eca220a4f5baf00