Horizontal main menu

Hi everyone :)

//Enfold theme: 4.4.1
//WP: 4.9.6

1.1: I would like to make a horizontal menu inside of a horizontal menu, but everything I researched is a bit outdated.
Only thing I could do is a double vertical menu. So one menu inside of another, but it’s still vertical.
1.2: Is it possible to add icons/text <not hyperlinks> to the second horizontal menu?
1.3: If I would like to translate the whole website in the future, which plugins do you recommend that would allow me to translate the menus aswell?

2: Also, could you tell me how did you manage to make the social icons in form of a square in the upper right corner?

Thanks in advance!
Iwo