search engine optimalisation - sitemap for multilanguage

Question

Hi Gods,

i have a multilanguage site. Unfortunatelly the site was done when i learned that i need to you sub domains for different language versions (or sub directory, or different domain..)

Now, i have no time, and money to change the sturcutre of the site.

If i make a search in google in english, than its ok. But if i made in my language then i get result in english too in the TITLE tag. (i fill the tag with php/language file).

The language of the site is change automatic. (language of the browser) or the user can change it manually.

I think i have to change my sitemap.xml and resend it to google.

May i use two link in the sitemap.xml with different query strings?

<url>
<loc>http://www.mysite.org/index.php?q=en&lt;/loc&gt;
<priority>1.0</priority>
<changefreq>monthly</changefreq>
</url>

<url>
<loc>http://www.mysite.org/index.php?q=de&lt;/loc&gt;
<priority>1.0</priority>
<changefreq>monthly</changefreq>
</url>

Is this any other technique to get the right result of a search for each language?

Thank you folks,