Howto to add a message in $lang

[Oliver Schulze L.]

Hi,
I'm developing a phppasswd.php3 that is a replace
for poppassd.php3.
I need to add a new message to the var $lang.
I want something like:
$lang->please_wait

I added a line in:
/horde/imp/locale/es/passwd.lang
that says:
$lang->please_wait = 'Por favor espere';

But I can not use it in:
/horde/imp/phppasswd.php3
It says:
Warning: Undefined property: plase_wait in 
/var/www/html/horde-1.2.6/imp-2.2.6/phppasswd.php3 on line 107


Thanks
Oliver

-- 
Oliver Schulze L.
oliver@samera.com.py
Asuncion-Paraguay