The first eight Ukraine air force pilots to train on F-16s have been chosen and it appears English fluency is a requirement. The first eight are all fluent and another 20 with some English are heading to England this month to brush up on the language. The eight English speakers are waiting for a formal training plan from the European countries that will be donating their surplus Vipers to Ukraine. The U.S. has to sign off on the training plan and it's not clear how long the plan and its approval will take, but it might happen before the end of the month.
This is a companion discussion topic for the original entry at https://www.avweb.com/aviation-news/first-eight-ukrainian-f-16-trainees-selected