Hello,
You need to use custom css code, for example, add this code in Theme Options > Styling > Custom css:
.top-bar.topbar-color-white a {
background-color: transparent !important;
border: none;
}
.wpml-ls-legacy-dropdown .wpml-ls-sub-menu, .wcml-dropdown .wcml-cs-submenu {
background-color: white;
width: 180px;
}
.wpml-ls-legacy-dropdown .wpml-ls-sub-menu .wpml-ls-item a {
color: #999999;
margin-left: 20px;
}
.wpml-ls-legacy-dropdown:hover a.js-wpml-ls-item-toggle.wpml-ls-item-toggle {
opacity: 0.4;
color: white;
}
Regards