.more-less .e-n-accordion-item span.mniej {
    display: none;
}

.more-less.elementor-widget-n-accordion .e-n-accordion-item[open] .e-n-accordion-item-title span.more {
    display: none;
}
.more-less.elementor-widget-n-accordion .e-n-accordion-item[open] .e-n-accordion-item-title span.less {
    display: inline;
}