only polish nothing there better you learn polish before you came poland
Oh do shut up Polymitsuk
The weather in April is mild - a light jacket and shirt / t-shirt would be fine but bring a jumper just in case it gets cooler at night.
The younger generation speak perfect English and the older generation understand, pointing and guestures work wonders ;-)
Just get a loney plant guide book for the pleasantries.
Food is fab and people are lovely :O)