It's a CSS error:
<select class="form-control" id="userLang">
<option value=""></option>
<option value="ar"></option>
...
</select>
White font on a white background. Whilst they're at it the devs should remove all languages apart from two or three and provide the rest as language packs. At a minimum, provide a means to disable unneeded ones!
I have had a dig around style.css but any definitions I set are being overwritten probably by javascript, or some other code.
Example:
select.form-control:not([size]):not([multiple]) {
font-size: 13px;
color: black;
}
This also doesn't work:
.ibox-content {
color: black;
}
My clients all understand English, so no dropdown at all would be preferred.