Using config item in language file

[eluser]bhumes[/eluser]
Is it possible to use a config item in a language file?

I have this in my application/config/config.php file:

Code:

$config['settings.tollfree']  = '00 800 4263 7393';

and in my application/languages/english/all_lang.php file:

Code:

$lang['call_us'] = "Please call us at ".$this->config->item('settings.tollfree').".";

When I run it, I get this error:
A PHP Error was encountered
Severity: Notice
Message: Undefined property: CI_Lang::$config
Filename: english/all_lang.php
Line Number: 204 <-- this is the above line #

I am assuming this has to do with the order things are loaded in CI. Is there anything I can do about this? Any advice?

Thanks a million!