What query parameters does Bing have

I'm writing a bookmarklet^[1] for Bing, and would like to customise my search.

The bookmarklet URL takes the form of:

https://www.bing.com/search?q=%s&some=other&parameters=etc

After quite a bit of searching and experimenting, I have found:

q          # search keywords
count      # how many results per page
adlt       # safe search (strict, moderate, off)
cc         # ISO 3166 country code
setlang    # set interface language, e.g. fr-fr, en-us
lf=1       # pages only in the same language as the interface
format=rss # get result page as RSS

What other parameters are there? I am, in particular, interested in restricting the results to pages in a certain language.

_{[1] Technically, a Mozilla custom keyword.}