I have found the solution.
The contact forms can be created using a locale
at the beginning. I contacted the Plugin Author and he directed to this page
I also made changes to the settings.php
of the Contact form 7 as the following:
function wpcf7_get_request_uri() {
global $wpcf7_request_uri;
if (($GLOBALS['q_config']['hide_default_language'] == 1) AND ($GLOBALS['q_config']['default_language'] != $GLOBALS['q_config']['language']))
return ((string) '/' . $GLOBALS['q_config']['language'] . $wpcf7_request_uri);
}