All player facing messages are now configurable via the lang.yml file.
Any messages not found in your lang.yml file (which may occur after updates) will automatically populate inside the file after it is displayed the first time, so there is no need to update the lang.yml file completely after each update.
(However - As with all configuration files that take time to modify, I would recommend keeping a backup)
If you are using Domain in English, then the smoothest transition would be to delete your lang.yml file and it will recreate itself when the plugin starts.