Looking for an English/american mothertongue for a website translation review

Hi, i am a nature guide. I have already made my website's english translation. i just need some mother tongue to review, control and correct my translation to make it sound more "real english" than a typical english translation made by a foreigner. Definitely i need a good english in my website. I already have a doc file where you can put your corrections. I think It should be a quick job for a mother tongue.
ps i attach here a doc file with my english translation