Step 1: Upload the theme then translated to the languages you want by
+ going to Actions -> Edit languages -> Translate:
Then, Go to Actions -> Preview -> Click right mouse to get the linking theme
Step 2: Create the menu navigation
Go to Navigation -> Create a new menu then add the link which just has copied to the menu
Step 3: Add the link to the theme
Go to Theme settings -> Languages Preview
Show Language Preview: Tick on the option to show the language section on the header
Language Title: Enter the title for this section.
Choose the Language menu: Select the menu to show here.