what is the best solution

in an hypotetical situation where an ukrainian ,belarussan or russian girl fall in love with me and me with her did i learn russian because i have understand than russian lead to ukrainian and belarussan with differencies of course like between french,belgium,quebec,or,swiss, or did you think that the level of english of the young generation is enough,what is the flexibility for a person of these countries to learn a roman language like french here you can find in russian some informations about the level of language penetration,in fact belaruss and russia are bit better than ukraine and not far from france https://www.ef.com/wwru/epi/ you'll see when i browse profiles of girls on the websites you have different levels weak good very good and fluent but what is good for a russian/ukrainian/belaruss speaker, i don't consider myself as fluent,but i read it very well,i'am not perfect at writing,and haven't speak since a long time ,in fact i used more english than french, i watch 99% of movies and tv shows in english with french subs,it's look like the translators don't understand the shorcuts,maybe is the same for people i don't know, i participate to a multicutural forum and its look like english is mastered,by all the westener europeans,and what about french in these countries is it mastered or not,it's looks like women are better than men,for myself even i have a school base i've learn english by myself and i'am much better now than in my early years and because i use the anglophone web at 80/90 % for sure this world dominance of english don't please to everybody but is better than nothing, but i have read than in a bicultural couple using english for example is tiring especially for eastern women,and can lead to break-up in some few cases,but i'am a very didactic guy for some few things and writen is one of them.