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Iryna, you still didn't answer why you removed the Russian name and the pronunciation of the river? Did you know that there a city which named after the river. Its name is Lugansk/ Luhansk (Russian and Ukrainian variants). Maybe you didn't know, but the Donets Basin is a multilingual region. As one can see below, Britannica uses both variants of spelling the river's name:

— Ιγκόρ ( talk) 07:29, 2 June 2017 (UTC) reply