I never tried to write anything of my own but I have helped some of my friends to improve some of their texts translated to English. I also don't think you should focus on "writing style" so much... You are missing a point here.
The point is: your drawing style is what's awesome. The plot and writing style are just accessories to your drawings.
You just should give it a try. Ask your friend to write a sample plot with dialogues and narration for maybe 2-4 pages. Something like a pilot script. Then translate it to English trying to convey the idea, not the style. And at last give it to some people like me, willing to proofread it. They can help you fix language problems. If they will like it, you guys can start a whole new, longer story. Then see if the people you were working with, are interested to work with you on a bigger project.
PS: ugh... >_<' Wall of text. More of a monologue than a comment. I hope I didn't bore you to death.
Мне так нравится вся эта шобла =￣ω￣= Люблю то, что имеет начало и конец. И такое греющее время, и мяхко визуально, живое все, а такого мало, Мне даже лень каждый компонент указывать, ну в общем так. По-Моему, Я уже оставляла подобный комментарий, но полюбас это мероприятие еще повторится о_о