Language Overrides
When you make customizations to included language files their overwritten when you update SoluteDNS. To stop this you can use override files.
In the folder: lang/override/
you need to create a file equal named to the main language file.
You can add custom language here. To override existing language values you can simply copy the language variable to the override file.
lang/english.php
$_ADDONLANG['client_title_permission'] = "Access denied!";
lang/override/English.php
$_ADDONLANG['client_title_permission'] = "Oops, you are not allowed to access the given zone.";