The post https://usavm3domain.gadix.net/international-congress/ should have had a Russian translation that was missing.

The issue was due to how this content was recorded in old database. The id for this entry in the old databaase is #268. The html file for the russian version is present, but the 'DocTitle_ru' is empty, so the script did not create the translation, as the Doctitle field was required.

I have manually added the translation, which out of the browser has these characters: https://usavm3domain.gadix.net/ru/%d0%bc%d0%b5%d0%b6%d0%b4%d1%83%d0%bd%d0%b0%d1%80%d0%be%d0%b4%d0%bd%d1%8b%d0%b9-%d1%81%d1%8a%d0%b5%d0%b7%d0%b4/

You may wish to customize it.