Notice the date on that graphic - 2003. Might as well be a B.C. date in Ukraine. Even in the farthest East portions, the use of the Russian language has decreased markedly as the “common language”. I’ve been in that green section (East-Center) - was in 2018). The anti-Russian sentiment, not just in language but anything specifically “Russian” was thick. Even greetings like “Hello” that sounded more like the Russian “privet” vs. the Ukrainian “pryvit” (yes - as tiny as the difference is) would often get dirty looks. Even in the South - there was massive distrust of Russians.