Brett from Niche Laboratory here.
Just to remind you that at the moment the Niche Laboratory only works in English.
Actually that's not quite true. It will do jobs if your keywords are in other languages, but the results could be unpredictable, or downright rubbish.
The issue here is that the Niche Laboratory has a lot of language processing code that only works in English. Also some of the data sources are only available in English.
If the site gets more popular I could add in multi-language support. But there are major costs involved with doing this, so it's going to have to be a low priority for now.
More threads for you to read and post comments on.
Out of ideas? Then be sure to visit the Daily Niche Idea. Every day you'll get a different niche listed on this site.