I'm afraid, the only possible way to handle your first sentense "User:Nemo_bis, Can I remove Russian words from here?" is, as like Ukrainian, drop the Russian fallback, which as Chechen is also a language of Russian Federation, I ask now: is it really fair to you?
Here are some important notes if you have ever accepted that:
- You have to translate messages from, and only from, the English, no longer Russian, also ALL the untranslated messages will be English rather than Russian;
- You have to make sure every Wikidata stuffs (where you have to visit wikidata.org and find templates, modules, items and properties, and some of templates, modules and ALL Wikidata MediaWiki: namespace pages will also require sysop edit requests) are having proper Chechen translations;
- You have to make sure the donation CentralNotice BANNERS are proper translated (you have to ask Meta-Wiki administrators to get the translateable message)