switcher block

I'd like to make it possible to reach each language homepage when clicking on language links in the switcher block (which seems logical).

I've just installed and configured a site with three languages (english, french and spanish) and everything is ok with the switcher when I'm on the homepage (I can reach the three homepages directly through the switcher).

Then, if I want to reach one of the two other homepages when visiting another page than the homepage in one of the blocks, the current node id goes behind the language id.