rename en_UK to en_US
updated English YT messages
exclude English from locales list
updated notification templates
updated languages names: community translations marked
Fix typo
Merge pull request #2 from bedla/master

Fix typo in month name
Fixed various mistakes
Fixed user groups label
Merge pull request #3 from coderion/master

Fixed various mistakes
updated english messages
wrong translated word
Merge pull request #4 from blmbyd/master

wrong translated word
update english strings
sources for client-side translations