Currently header menus are hidden in mobile screens.
And you haven’t set any primary menu yet that is why mobile menu is appearing blank.
You can create main menu in Appearance > menus screen and pls set primary menu in “Manage Locations” tab or atleast you can set first 4 menu items as primary menu and the rest two menus as header menu otherwise it doesn’t looks good.
And can use the below custom CSS in themeoptions to display header menu in mobile screens –
@media only screen and (max-width: 767px){
#header-menu {
display: block !important;
}}
You can use a translation file (using POEdit to change the data in languages directory) to change to any string you like. If you do an update in the en_US.po (or another depending on your site language) file, you should see all the translatable strings in the strings list . You would then be able to input any alternate string of your choice there.
Pls search for “Expand” string and insert an alternate string in the translation area , save and update the changes .