Finally I found a great WordPress plugin fulfilling my dream of easy running a multilingual site. It is really great and recommendable – WMPL. Both the configuration and translations are very simple. You can create multilingual sites, translate the entries and also skin of your blog.
I hope that now I will be able to write more in English:)
Here is the first note under the new address. Finally I have bought my own domain and virtual server.
Previously the page was set up on free ovh, which was a little bit slow and unuseful.
But for the first 3 years it was enough for me.