Wikipedia accepts both spellings, and so does the quiz.
https://en.wikipedia.org/wiki/Kiev
According to the Kyiv Post, though, The United States Board on Geographic Names, or BGN, has changed its English spelling from Kiev to Kyiv, as announced in a statement on June 13, 2019 by the Embassy of Ukraine in the U.S.
https://en.wikipedia.org/wiki/Kiev
According to the Kyiv Post, though, The United States Board on Geographic Names, or BGN, has changed its English spelling from Kiev to Kyiv, as announced in a statement on June 13, 2019 by the Embassy of Ukraine in the U.S.
ttps://www.kyivpost.com/world/kyiv-not-kiev-us-changes-spelling-of-ukrainian-capital.html?cn-reloaded=1
Thanks for "Bulgaria".