qTranslate-XT (eXTended) - reviving qTranslate-X multilingual plugin for WordPress. A new community-driven plugin soon. Built-in modules for WooCommerce, ACF, slugs and others.
I don't understand the problem. If I follow the link on your website, it appears in German for me. This depends on your browser settings.
If you switch language to RU in the URL it will switch.
What do you expect?
I have such settings Detect language by browser enabled Url modification: ?lang=ru
I would like "de" language as default in all ip and browsers But default lang is russian which is used in admin panel Url: http://tld-pro.de/