Good morning everyone!

Not sure if this is the right section to post but i'd like to rewrite two urls in my website and after searching found out that mod rewrite through htaccess was the best way to go but couldn't find a clear explanation on how to achieve this.

Here's the thing my url is currently like this : http://www.domain.com/wordpress/?lang=en
and
http://www.domain.com/wordpress/?lang=fr

What I would like to do is have it rewritten to :
http://www.domain.com/news.html
and
http://www.domain.com/nouvelles.html

Any clear explanation on how to do such thing?
Could I encounter some problem while doing this?
Is the htaccess supposed to be in the root of my domain?
Will this affect the way I link to those pages? (can i still use /wordpress/?lang=en .. or will I have to use the new url ?)

Thank you very much!