What is the name of the domain?
What is the issue you’re encountering
I have created two different google sites as in English and Turkish, I linked with each other, but dont know to move to my new domain oguzkaanpehlivan.org
If you have two separate sites, then you have to use two separate addresses --a as you can’t link one hostname to two different sites.
It seems www.oguzkaanpehlivan.org is linked to the English site now. So for the Turkish site, you’ll have to configure a different subdomain, like tr.oguzkaanpehlivan.org.
The alternative was to have built a single site… then you could create a page www.oguzkaanpehlivan.org/tr/ and have all the Turkish pages be sub-pages of this /tr/ page. But this is not the direction you chose.
Good luck!