prestashop $this->l
===

with prestashop 1.4.8, PHP 5.3 I want to do this in a module.

    $myVar = 'Vincent';
    echo $this->l($myVar);

I don't know why it doesn't work, and what the 'real' difference with 

    echo $this->l('Vincent')

I need to do this becose labels comes from XML files from my own modules configuration system.

any idea ?

Thanks you all.