According to Google, you can specify languages in a sitemap like this:
<url>
<loc>http://www.example.com/english/page.html</loc>
<xhtml:link
rel="alternate"
hreflang="de"
href="http://www.example.com/deutsch/page.html"/>
<xhtml:link
rel="alternate"
hreflang="en"
href="http://www.example.com/english/page.html"/>
</url>
However, I just need to specify that ALL the sitemap/website is in Spanish, which means it's not a multi-language sitemap, it's a one-language sitemap but that language happens to be "Spanish".
Should I include a hreflang
tag for each and every URL? or is there a better way to do this, like specifying it in the header section?