I have created a post type for reviews with two options: a video or a text review. On the first translated page I got the Field Choices, but somehow they aren't shown on the filter:
Meanwhile this ticket is attended by one of my colleagues, please note that the said plugin (Filter Everything) isn't on our compatibility list (https://wpml.org/plugin/).
Theme and plugin authors are welcome to join WPML’s Go Global program, which helps them make their code multilingual ready. Together with WPML’s compatibility team, they can test and confirm that their theme or plugin works with WPML. See https://wpml.org/documentation/support/go-global-program/ for details and you can refer your theme/plugin provider to this as well.