Can't speak for Kazakhstan, but Germany and surrounding countries have sauerkraut, pretzels, beer, cider, wine, french fries, dumplings, pumpernickel and many other breads and brötchen, apple sauce, veges like asparagus and kohlrabi, desserts with rhubarb, red currants, berries... Certainly most meals are meat- and dairy-forward, but it's not like there is nothing else in the cuisine.
You'll note I specifically talked about main dishes. Yes, of course, every country will have some food that just happens to be vegan. But only a few countries and regions of the world have actual cuisines and main meals which are vegan.
I'm not sure what your point is? The issue is if someone can continue eating the food of their own region or culture while also following a more plant-based diet. In all but the most arid and inhospitable parts of the world, there are already a fair amount of local plant-based dishes.
It's true that people may need to supplement their diets with some kind of substitute that provides a similar nutritional content to meat and dairy, or add alternative dishes from outside their region, but for the most part it shouldn't be all that difficult for most people from most parts of the world to eat plant-based without fully changing up their entire diet.