404 for english translatet pages

[fsr-geo]

hi, i just translatet nearly my comlete page (http://fsr-geo.de) and now i have two problems.

1. post works fine, but when i want to open a page i get every time a 404.
2. how can i translate the menue so that it will be shown in english when user choose to view the page in english.

i hope someone can help me soon. sorry if this threat has already answered somewehre else. greetings michael