How to subscribe to multiple feeds from same page?

Since I blog in both english and swedish on blog, http://voxpelli.com/, I offer two feeds - one with only english posts for non-swedes and one with all posts for swedes and now when I add SubToMe-buttons I would like to have one button for each feed - but currently that doesn't seem to be supported - so I wonder what the best way to achieve this would be?

I'm thinking perhaps something along the lines of:

```
https://www.subtome.com/load.js#feed=http://voxpelli.com/english.xml
```

`load.js` could then extract the feed parameter from the hash parameter and use that as its feed parameter rather than the first URL of the linked page - what do you think about such a solution?