1. I’ve checked your site and it seems that the settings file is not populated with any data. Usually this happens when the file doesn’t have proper permissions so make sure you make the file “custom-styles.css” located in the theme’s folder > framework/admin/admin-options writable on the server. It should have permissions set 755 or 777.
2. I’ve checked it on my iPhone 7 and the buttons is properly displayed. On what device are you encountering the problems? Can you post a screenshot of how you see it?
1. You’ll need to edit the translation file located in the theme’s folder > languages to translate any of the strings. If you want to hard code the translation you can find it in the theme’s folder > framework > inc > share-icons.php.
2. The logo is managed by WordPress itself. In your dashboard > Appearance > Customize > Site Identity > Logo.