Hi,
After working as a translator in a large video game company (publisher of Skyrim) for 3.5 years, I am taking a break for a while, and have a lot of time on my hands, meaning I'd be available to work on any number of projects you might have.
The way I would usually work would be by starting with a quick read through of your project, to get a sense of the tone and context, which I find usually to be as important as correct grammar and spelling. Then I would do the actual translation, making sure your text matches both the appropriate tone and context, and is of course in proper English.
If you have any questions, I'd be happy to answer them.
Have a good day,
Arthur