I want to put a language string in the introduction text
of the registration page.
In the CB Configuration -> Registration -> you have a field to put an introduction text and a field to put some text under the registration page, here you can put a language string like _UE_WELCOME_DESC
I have changed the language files, and put into the language files a new line: DEFINE('_UE_WELCOME_DESC','test');
but on the registration page, instead of showing the word 'test', it shows _UE__WELCOME_DESC.