(CE-610) Add translations for CloseMyAccount

Adds translations to CloseMyAccount extension for de, es, fr, it, ja,
pl, pt, ru, zh-hans, and zh-tw.
(CE-610) Fix formatting of translations

Fix links to point to correct language help wikias and change translated
special page links to the English ones so they will work on any language
wikia.
Merge branch 'CE-610-i18n' into dev