Super.so uses Notion as its backend, so multilingual setups are not automatic. You will need to duplicate your notion page and translate it to the language you desired.
STEP 1 : Translate your Pages in Notion and Make Sure it is a Subpage
Ensure that each language version of your content is translated in Notion and organized as a subpage. This will allow you to link directly to each language from your site.
STEP 2: Create your Navigation In Super
Go to Languages Section
Click Add Language
Select Language and choose the page.
Hit Settings Icon
Click manage Navigation Settings
Add Item and set up your navigation menu
Save Changes
Here's the preview:
