Multilingual questions for a Druapl 5 site

Just a few questions regarding Drupal 5.7 & i18n (Internationalization).

1. Does anyone know if its possible (and how) to allow different users language specific privileges, i.e. I want one user to only be allowed to create English content, and another user to be only allowed to create Chinese content.

2. For some reason when I create nodes of one language, I can't create nodes of another language, that have the same path. So if I have
www.example.com/en/about-us
I can't have
www.example.com/zh-hans/about-us

It seems to let me do it, if I specify the path specifically as "zh-hans/about-us" - but this relies on the user to know what the language path is, and write it in correctly.

Do I need to do a mod on the path module so that it shows a drop down for language path prefix or something ? Does anyone think this is a bad idea?

Thanks!