/im-598694.jpg "Olena Shubina, a fitness trainer in Kyiv, makes an effort to speak Ukrainian over Russian. (Joseph Sywenkyj/The Wall Street Journal)")
At a Kyiv bookstore one recent evening, two dozen adult students took turns explaining why they were brushing up on their country’s official tongue.
Among them were Kyiv natives who had never mastered Ukrainian and refugees from Russian-speaking front-line towns pummeled by Russian rockets.
