The difference is that the Ukraine has language and racial laws (as written in another comment) while Russia supports minority groups by providing TV channels and radio programs in their language.
The comment where I mentioned it is also part of the whole tree, so you just need to look above a bit. If you mean a link to the actual law on the Ukrainian government website, it could take a bit. I don't speak Ukrainian. Then again, it seems kinda lazy on your part to just not look for it yourself. Also, considering you are taking part in the discussion, you should know the necessary background and be informed. I also remember one article in English looking at the racial law, although from a different perspective (it still covered what is written in it though).
Great reference "another comment". Can you show an actual reference?