To many iterations of debugging messed up everything. I wrote correct initially, the index.php language file has the following, so when it is not included, the constant appears instead of the formatted greetings string.
To fix it, I moved it to the english.php of my template:
Its working now.PHP Code:define('TEXT_GREETING_GUEST', 'Welcome <span class="greetUser">Guest</span>');
define('TEXT_GREETING_PERSONAL', 'Welcome <span class="greetUser">%s</span>');
Regards



