Project/Task management software? (hosted on-site, with localized russian interface)

I am currently researching what project/task management software is available on the market. My requirements are:

1. solution needs to be hosted on my server, located on-site;
2. it should be possible to switch interface language to russian (since all of employers are russians);
3. it should not be software oriented (in terms of bugs, features, improvements).

If you know anything that can help me, please leave a comment or an answer! Thanks in advance!

I would recommend Project Management Standard software by Microsoft Project 2010. This software gives managers an easy way to handle projects. They've made a lot of changes to their visuals and I've noticed that this project manager software has given much higher productivity rates.