How do I change the message displayed after people register?

[peterska2]

Languages and phrases > search in phrases > phrase text only

paste a snippet of the current text in there and hit search. then find the complete version of the text and use the edit button and type your new text in the box at the bottom of the screen that opens.

If you want to copy the default as you want to use the majority of that and just change it a bit, use the COPY DEFAULT TEXT button first which will move the default text into the bottom box for you to edit.