Language Problem for permalink and others

Hello there,
I installed the theme. I have set the Admin panel language Turkish.
When the language is set to Turkish, the demo files are not discarded.
When I set the language to English, all the operations are performed without error.
I made the language settings again in Turkish.
Whenever I want to open a new product, it will fetch permalinks incorrectly and randomly.
When we set the language back to English, we can open the products smoothly.
Since our customer does not speak English, we have to use the admin panel in Turkish.
when we turn the theme to passive, we can open the product as smoothly as Turkish language setting, but when we activate the theme, we are getting bored again when we open the product.
permalink problems continue even when creating pages, not just products.

Hello,

After setting your language to Turkish, please go to Settings >> Permalink and select “Post Name” and then update the permalink.

There are many many users running the site with Turkish language set as backend and frontend language, so this is not due to theme, however, if you still face the problem after trying the above solution, please click on “Report a bug” and include your wp-admin access and FTP access and I will look into it for you and let you know the cause / solution.

Thank you

ok, i try now but problem is not solved.

now i am sending access information.

I tried something different. I made the admin panel language German and everything worked
again.
But I could not study anything in Turkish.
Everything was available when I made the trip passive.
I am sending you domain and hosting information I have opened for you to try.
if we can reach the solution here, we have to do the same operations on our original site.
original site www.montis.com.tr