Remository is written to support template overrides. There are a number of views, and any of them can be overriden. Some of them incorporate layouts - those can also be overriden. For help in handling the review of overrides needed when software is updated, you are recommended to use our Template Override Manager.
Remository uses many language strings. They are translated into a number of languages. If you wish to change the text that is shown to users, you can employ the Joomla language override feature (on the System page of the admin interface).