- mapping is not intuitive for non-native English speakers (flora, really?!)
- manual table mapping needed for ORM systems
I'd prefer the singular, but ActiveRecord uses the plural, and I'd rather go along with the default, rather than fight and create friction for my team.
EDIT: looking closer, the style guide is great, but the naming conventions are atrocious. I'm reminded of what my Intro to CS TA told us: naming stuff is hard, so try to explain your code. If you have to explain what something is, the explanation should be the name (within reason)