I am interested in your project on behalf of my son, Rouan, who has a degree in linguistics and has a good understanding of English grammar. He has taken classes in the English language as a tutor at Auckland University, and some of his current work involves copy editing works in English. He would like to know more about your project, mostly regarding how much is needed for each topic (e.g., how many words would be required for the vocabulary list) and how many topics there are in total, and how much your budget is for each topic. Rouan does not have a profile on Freelancer (yet) but has carried out several successful projects via my account. As for me, I have been working on Freelancer for three years, always with good results and good reviews. We are both native speakers of English.