umm ... this is a tough one as you not only want to have your multi-language site indexed but you also want the language pages to rate high for the keywords you are targeting ... otherwise it is not worth getting your site indexed

what i would suggest is that you have separate domains for each language version of your site

the reason for this is that you will then be able to arrange exchange links for the home page of each one which in turn will drive up the link popularity of each one ie. you will be able to promote each site in its own right

the alternative is to have sub-folders for each language translation, with each home page indexed to your main site's home page ... and this way you will only be able to really promote the main site and each language site will get its rank from your main home page which i don't think is a good idea if you want to seriously promote your language sites

hope all this makes sense

serge