Galician (gl) translation updated by Adrián Chaves Fernández (#18502)

git-svn-id: http://svn.redmine.org/redmine/trunk@13687 e93f8b46-1217-0410-a6f0-8f06a7374b81
Bulgarian translation updated by Ivan Cenov (#18507)

git-svn-id: http://svn.redmine.org/redmine/trunk@13688 e93f8b46-1217-0410-a6f0-8f06a7374b81
Traditional Chinese translation updated and changed by ChunChang Lo (#18519)

git-svn-id: http://svn.redmine.org/redmine/trunk@13689 e93f8b46-1217-0410-a6f0-8f06a7374b81