Poprawilam, bo niestety bylo bardzo duzo bledow -
..because you will be flyING to Poland 'in' (po co in?) next week and I want know 'a couple' (lepiej 'some) 'information's' (NIE, nie - information jest niepolicz. niema l. mnogiej) about you and TO give you 'couple' (some)
'information about THE weather in Poland 'etc' (tego sie nigdy w liscie nie pisze - co to ma znaczyc?). I want TO ask YOU for THE date and time when you arrive IN (you arrive IN) Poland, because I want TO pick 'up you'(nie, nie pick you up) from THE airport. I 'wont' (zle wont - WANT, a do tego - ty niechcesz to znaczy I don't want) 'that you lost' (you to get lost) in Poland when you 'will be trying' (try) TO find where I live, so I WILL pick 'up you' (nie, you up) from the airport and 'we' (niepotrz) together WE can go to my 'place' (lepiej 'home). I'll be waiting AT THE airport and I'm a middle 'high men' (NIE, ..of middle height). I'm 175cm tall, with brown eyes and short blond hair, I'll 'have wear' (nie, be wearing) a blue jacket and jeans 'in airport' (niepotrz) and I'll have with 'self' (NIE, nie self - a 'me') a big 'transparent' (poster) with 'big JOHN writing in him' (to jest zle - lepiej JOHN written in big letters on it) .
You should 'take' (bring - przywiez) with you 'a' (bez 'a') some winner 'cloth' (cloth to jest material - a ty masz na mysli ubranie to 'clothes') because in Poland AT this time 'its' (nie, zle uzywasz tego tutaj potrzeba it is) freezING. We have 'winner' (eh, chyba nie, winner to znaczy cos innego - masz na mysli winter?) and 'take' (bring) with 'self' (you) some warm winTer
shoes we have a lot of snow 'in' (in nie potrzeba) here. When you arrive AT my place we can go to a local history museum in Warsaw. I CAN tell you 'its' (lepiej it is) amazing, you will be surprised how many incredible things you CAN see in this museum. I AM really happy that you ARE coming to Poland and I can't wait when UNTIL you will be 'in' (nie potrz) here.
If you can please 'repeat' (chyba reply) to mE because I really want TO know 'when exactly' (exactly when) you ARE comING to Poland.