Styling in Elementor Pro

Hello. I’ve been trying to customize menu item generated by MSLSMenu. The only way to do so is to customize “a” tag, but then all items in menu pickup same settings. I’ve tried to add class before menu item in MSLS settings, but no luck… Please can you help me to select just a language item in the nav menu so I can customize it. Thanks.
Best regards,
Goran