The training would need to be in English as all of the flight systems will be in English and the training is not just on how to physically get the plane off the ground, but also in tactical usage which isn’t ideal being run through translators..Why would the training need to be done in English? odds are that one of the many training staff for the F16 would actually speak Ukrainian anyways? And with English being so prevalent in Ukraine anyways the numbers in the article dont add up. If English is spoken by 50% of Ukrainians as a 2nd language why would there be such a massive non English speaking level amongst fighter pilots? 8 being able to speak English and 20 not? Id suggest that with Pilots generally being higher educated that the prevalence of English would be far higher than not. Numbers just dont add up and hopefully its just either poor reporting from "un named sources" or a ploy to suggest planes wont be there in any large number soon and more arrive quicker than Russia expect.
The only reason for English to be needed is if there are tons of automated systems in english and cant be changed to speak/show Ukrainian.
On the proficiency of English in Ukraine, I can only speak from personal experience but I have been volunteering with Stockholms Stad Ukraine youth programme here for 18-29 year olds and even with their stats being heavily skewed by younger people learning English rather than German now, they still are mostly more proficient in written English than spoken English.
It’s also important to point out that up to 50% would be considered proficient in English, that still only puts them 27th best in Europe ahead of only Russia, Belarus, Georgia, Moldova and Albania, and their pilots that are going to be put forward to fly F16s realistically are not going to be 22 year olds fresh off L-39s, they’re going to be older guys who didn’t grow up learning English..