Thank you all for your answers, but I'm not entirely convinced that this solves my problem.
There won't be an swedish version of the same content, so specifying an alternative language doesn't seem right. Hopefully it's better than doing nothing, but I would've felt more at ease if I could specify it on anchor tags linking to the page, and "globally" for that page alone.
If there is no other solution, it makes me feel like I really should translate the entire site/blog...