https://tatarstan.ru/documents.htm
So, a guide through all the relevant administrative documents you might need. Let's click the "TAT" button to switch to the Tartar language... Oh wait, what's this? It doesn't exist? Imagine that. Another Potemkin website. The most ironic thing is that the "Report of the Tatarstan Foundation for Citizen's Right Protection" (PDF) is russian only.
Regarding your pre-edit statement about seething in anti-russian hate: if russians don't like it, they can stop invading, stealing and killing. Maybe that'll help?