I am fascinated by the language situation in Ukraine and the recent article by James Meek in the London Review of Books ( https://www.lrb.co.uk/the-paper/v45/n16/james-meek/every-field-every-yard) helps to feed this interest.
Meek refers to those who have changed from using Russian to using Ukrainian and gives the example of a singer, Ruslan Kuznetsov, who used to sing in Russian but now uses Ukrainian. He surprised Ukrainian speakers by using it so well but for many Russian speakers, this change will be a challenge.
Meek also refers to the way that English is playing a more important role and how it might be more sensitive to try English in Ukraine first rather than Russian if a person only knows English and Russian, which is the case for him.