But do you think it is better to start studay PhD in polish university and in the seam time study english
You'd need to check with whichever uni you want to go to in the UK that they will accept the work you did in Poland (and that they'd accept your undergraduate degree too). I'd think that they probably won't.
His posts suggests he is aiming for a non-Phd working visa
His chances of getting either are very slim: a British university is legally required to insist on a minimum of IELTS 5.5 in all four skills. As to British universities running courses in Poland, well it would be terrible PR for them to have one set of entry qualifications in the UK and another in Poland.
There's an interesting thread about studying in Poland which specifically mentions the above-named private uni: nairaland.com/282780/hh
I do hope that British universities carry on being smart enough to stay well out of the 'overseas branch' game when it comes to Poland.