Add content about Localization languages
Created by: aydun
Move Date preferences into dates file Spelling and formatting tweaks
Relates to https://github.com/civicrm/civicrm-core/pull/13240
Created by: aydun
Move Date preferences into dates file Spelling and formatting tweaks
Relates to https://github.com/civicrm/civicrm-core/pull/13240