I found the answer :
thanks :ElectricFeet (member):
You would have to modify class-fire-init.php around line 320 to add:
add_theme_support( ‘mqtranslate’ );
and change line 419 from:
if ( current_theme_supports( ‘qtranslate’ ) && is_plugin_active(‘qtranslate/qtranslate.php’) ) {
to:
if ( ( current_theme_supports( ‘qtranslate’ ) || current_theme_supports( ‘mqtranslate’ ) ) && (
is_plugin_active(‘qtranslate/qtranslate.php’) || is_plugin_active(‘mqtranslate/mqtranslate.php’) ) ) {
(Thanks to d4z_c0nf for this code.)
Let us know how you get on.