All languages have tons of words that are borrowed from other languages. So that's not as unique and I don't think that's the sole culprit, or even the primary one. Polish has borrowed from Latin, Greek, French, German, Russian, and I think even Yiddish. Of course English in this day and age XD I'm sure I missed a lot of others that I have no clue about XD
For me the most difficult thing while learning English was all the grammatical times. Why the fuck do you need 16 of them xD Sure, in Polish we technically have 5 times, but we mostly use 3: past, present, and future. Simple.
For example, Polish grammar is difficult because more than rules we seem to have exceptions from them XD
To be clear, even people who don't have issues like dyslexia etc. still need all the editorial help they can get
