Welcome,
I'm native Polish speaker and I'd like to help You with your project. Mostly I work here as an English to Polish translator, which requires especially excellent skills in Polish. I'm on Freelancer.com for 2 years and I've finished 60 projects, of which 95% was rated at 5.0. I'm one of the most successful Polish translators on this website, with 44 awarded projects of 49 that I've bid. My offer is 120zł and I can guarantee the best quality.
If You're interested please send me a message. Please also check my feeback and samples of my previous translations on my profile to ensure that I am reliable freelancer. It's always better to work with someone proven, than with new users, because You never know what to expect.
Regards,
Michal