English to polish

My project requires an English to Polish translator. The translation will be used to localise in-game text, so accuracy and cultural sensitivity is a must. Editing is not required, and I need an experienced translator that can deliver on time. I'm looking for someone who is proficient in both languages, with a solid understanding of both the English and Polish cultures, as this is important for any in-game text. The ability to incorporate colloquialisms and idioms into the polish translations is an added bonus. The successful translator must provide quality translations with an easy-to-follow style, so that implementation into the game is a seamless process.