osTicket is only available in English? (specifically American English or en_US)Centre is the English spelling of Center.Center is the American English spelling of Centre.There is no difference in meaning.That being said... you can always change the images to suite your needs.You can upload your own images at Admin panel -> Dashboard -> Information.If you would like a non US English to be available you would need to go to the translation project there:http://i18n.osticket.com/