the so called Law About Languages which is being proposed doesn't limit the number of regions where 'a regional' language can be established alongside the official Ukrainian, the population speaking a certain language must amount to at least 10% of the entire population of the administrative unit in order for this language to have the right to receive 'regional' status

in reality almost in every administrative unit Russian speaking population easily makes up 10% meaning that through this law Russian language will have all the chances to eventually become the second official language alongside Ukrainian

now legally speaking this law is anticonstitutional because its multiple clauses allow other language(s) becoming official for governmental bodies on the regional level
Clause 10 of the constitution of Ukraine declares Ukrainian as the official language of the state

hence the only way to lawfully make Russian or any other language official is by constitutional reform which then has to be validated on a state referendum
constitutional reform is a long process and it has to be voted for by 2/3 of the MPs which i don't think is feasible


politically speaking, Ukraine is on its way to the parliamentary elections scheduled for autumn, so various political forces try to gain dividends by speculating on the issue of language, because being politically insolvent they realistically do not have anything else to offer to the citizens or base their campaigns on