Hello all! IS there a possibility to set up osclass in such way, that default language for the website will be without code (test.com) and other will have a code (test.com/de    test.com/es   etc).
Sorry, didnt find such an opportunity in admin panel.
Thanks in advance

No, you can add it for all languages or not at all.

Add language code into base URL and change it to (based on your locale)

Theoretically, url without code is functional as well, but is redirected.