guess so...
Anywayz, I do that a lot, I use a lot of english when I'm talking to my friends which is considered weird by elderly people who think were 'desecrating' the national language.
It's just that I use english in almost everything I do (hmm let's see, Tv,Computer,Friends,KMC 😉)
I've been studying english since I was 8, both at school and off-school.
I also used to watch Cartoon Network 5 hours a day (at least) as a kid, for about 5 years, and as a result I'm actully quite fluent in english, and because I've been to england a couple of times (and watched movies and whatnot) I can speak with a pretty good accent, should I want to do so.
English is the only language I can say I've mastered apart from Romanian, but I also know 'some' french and german.
However, I am pretty unaware of many specialty terms (maths,physics,and so on...) because u just don't get to hear a lot of these in movies and such.
I 'can' make puns without thinking(albeit I really don't do it often because I don't really get the chance to talk to some native-english speaker that'd give me the chance to make one) but I actually find it harder to do them the other way around..