Hello,

You can try making your categories menu as the Mobile side menu by editing from Appearance >> Menus.

Screenshot for Clarification: https://ibb.co/S52hP0p

To change the text You need to install and use the Loco Translate plugin to translate the string.

You can watch our detailed videos on how to translate string using loco translate:
https://www.youtube.com/watch?v=D3NsDdMzsls

Regards.
Xtemos Studios