If you'd tried using the inline translation with MasterSlider like so:
[:en]English[:zh]Chinese[:], you'll realise it doesn't work properly but throws out the exact string as you entered.
masterslider/includes/msp-shortcodes.php, look for
Scroll down until you see this line, or you can just search for it:
$layer_content .= ! empty( $content ) ? do_shortcode( wp_unslash( $content ) ) : '';
$layer_content .= ! empty( $content ) ? do_shortcode( wp_unslash( __($content) ) ) : '';
I had requested the team to add the wrapper too. Hopefully they'll add it in the next release.