Please check out the following link to Swiss midwives. http://www.hebamme.ch/de/elt/heb/dir.cfm?md=kt&kt=zh
You can search for your town and on each midwife it will tell you what they specialise in and which languages they speak.
I am also in Stäfa and I used Sonja Zwahlen-Schöber. She was lovely, but don't expect a lot of English from her. She tried her best though!
Perhaps check out other local midwives that might travel over to you.
Book early (if you can)!
Hope that helps