It depends on which template pack you are using.
For Legacy, it is this template file:
buddypress\bp-templates\bp-legacy\buddypress\members\register.php
Overload that template by copying it to a directory that you create in your child-theme:
buddypress\members\
and make your changes.
If you are using Nouveau, it is more difficult. This is the file:
buddypress\bp-templates\bp-nouveau\includes\functions.php
It is not a template file, so your choices are:
1. hack the file and redo the hack every time you update BP – not recommended
2. use a language translator
3. write a filter function
function kimo_change_nouveau_string( $array ) {
$array['request-details']['message'] = "This is your custom message";
return $array;
}
add_filter( 'bp_nouveau_feedback_messages', 'kimo_change_nouveau_string', 20, 1 );
Paste the function in your theme/functions.php or in bp-custom.php
Test to make sure it is working.
Then adjust the message to your liking.
@shanebp I must say, thanks a million. Your method is the only one available to achieve this. I spent hours trying different solutions. Thanks again, you’re a legend!!