That game is 4 years old now.
It's not like Trump, or any President, writes their own speeches anyway. Anyone could have slipped that in mistakenly. Or, more likely, Trump said "F52s" when he misread "52 F35s", as Norway has ordered exactly 52 of them. Another possibility I've read in several defense journals today, is that they bought some classified aircraft with that designation. Doubtful IMO, but 10 bil is a lot more than 52 F35s as well, nearly double in fact, and that was the rational a couple defense rags used today in bringing up this point.
I think he just misread the line, saw 52 and F35 close together and said "F52" first, and not realizing his mistake, just went on to say F35s too.
This is nowhere near as ridiculous or insulting as when Obama called the US Navy corpsmen being decorated while serving with Marine Raider units "corpse-men". Ahahha. Corpse men. Only if they do their job poorly. Boom boom psshhh.