Hi Dmitrii,
Thank you for answering.
I'll try to explain why these settings are like this.
www.domain.com is a magento shop and the setting "Add Store Code to Urls" is set to yes.
This means my storecodes (which are the languages) are like this:
www.domain.com/ned (Dutch, default)
www.domain.com/eng (English)
www.domain.com/deu (German)
www.domain.com/fra (French)
To avoid double content between www.domain.com and www.domain.com/ned we use a rewrite rule from "/" to "/ned" in the nginx server settings.