As we can see with your invasion of Ukraine - russian language is used politically to motivate aggression and nurture your populations nazism/chauvinism. So one can easily say that adding name:ru is also political (and dangerous!). You did not keep German names after the German invasion of WW2, why should anybody keep russian names after your invasion? But this is all irrelevant in OSM. No label on the ground - no tag in OSM.