Add another YML feature like :hint

[metageeky]

I apologize in advance if what I'm doing is super simple, but I've been having trouble even figuring out search terms for this. What I would like to do is the following. I'm working in a system (Hydra Sufia) that incorporates Simple Form and Bootstrap and provides a simple_form_bootstrap.rb configuration file. I'd like to add something like :hint or :error so that I could put some extra instructional information in a yaml file as as with the metainstruction data below:

en:
  sufia:
    simple_form:
      labels:
        work:
          name:       "Title"
          description:      "Abstract or Summary"
      hints:
        work:
          name: "..."
      metainstruction:
        work:
          title: "..."
          keyword: "..."

Is this possible? If so, can someone provide example code?

Thanks in advance,

metageeky