(Click the small paint icon in the top menu to swap themes to see in native SUI)
I did a meteor dev night where I talked about some of the ideas behind Semantic UI, which might clear up some of the linguistic origins for the library and it's ideas about language:
https://www.youtube.com/watch?v=86PbLfUyFtA
Fantastic work. Our company use Semantic-UI for pretty much every project, as do I privately. A pleasure to work with, way above other frameworks I've used.