Bug Description

Clearly explain what the problem is.

Steps To Reproduce

Steps to reproduce the behavior:

1. navigate to https://www.dpdict.net/#
2. click on the link in the upper right corner to navigate to the Russian app
3. redirect to https://ru.www.dpdict.net/

Expected Behavior

redirect to https://ru.dpdict.net/

Additional Context

I tried to disable the www subdomain to prevent the problem on that basis. But I must admit that even though I removed the www.dpdict.net subdomain as the servername alias, it still exists.