Yep, this is an interesting situation to be in. I know several bloggers (most from European countries) who blog on their sites in a combination of both English and their native language, to try and appeal to both audiences. I think the challenge you’ll face if you only publish content in Swedish is that your audience will forever remain pretty limited… that’s not necessarily a bad thing if you have a solid plan around how to successfully monetize that audience. But ultimately, you’ll most likely eventually want to start publishing English content at some point too.
Cafe Press: This website allows you to create digital designs that can then be sold on the platform. You'll earn a commission for everything that sells and you'll never have to deal with logistics like printing, warehousing and customer service. If you have some graphic design skills, then this is a great potential source for your web-based income.