There is so much I could say as a response but I'll try to stay brief. :)

Erotica readers absolutely need good grammar because the flow of words is what helps the mind race and the juices flow, if you know what I mean.

I also try to tell writers that the majority will never actually make enough from book sales to make it a full-time job. They write because they love to - or because they have to.

As for the translations and editing... That's a little tricky because you really have no way of personally confirming the quality.

Hive account@zoorander - the only thing I can really recommend is to write what you love. Write in YOUR language. Share it here on Steemit. Publish it in your native tongue. Best wishes and Welcome to Steemit!

I highly recommend visiting the Welcome page for tips and tricks for Steemit.