Function to translate widget

Hi,
I’m trying to automatically translate my widget into different languages, so I use the following code :

/**
 * Return translation text
 *
 * @param      $token
 *
 * @return mixed
 */
 $LANG="fr";
 
 
function __($token) {
    global $LANG;

    $translations = include('./lang/' . $LANG . '.php');

    if (empty($LANG) || empty('translations') || !array_key_exists($token, $translations))
    {
        return $token;
    }
    else
    {
        return $translations[$token];
    }
}
 }

/**
 * Display translation text
 *
 * @param      $token
 * @param null $lang
 */
function _e($token, $lang = null) {
    echo __($token, $lang);
}

But with this code I get the error : Fatal error: Cannot redeclare __() (previously declared …

I don’t know if this function is used in a hook cause the name is very strange.

Have you a solution ?

Thanks, for your help.