Add this css in Custom CSS for horizontal selector of languages -> top bar position
.top_bar .widget-container ul li {
width: auto;
}
.wpml-ls-legacy-list-horizontal .wpml-ls-item {
padding: 0px 10px 0px 0px;
}
.wpml-ls-legacy-list-horizontal {
border: 0px solid transparent;
padding: 0px;
}