@fugu13 I recall we talked about the potential problems with merging language maps as well.

I'm still not comfortable with "MAY" here, one of the big things that makes having this metadata seem worth it for me is a way for the owner of an identifier to prevent fragmentation of meaning. I can see "SHOULD" might be a bit strong though given that the data could be stale.

What about something like "SHOULD strongly consider..." I'm after a weak SHOULD or a strong MAY here I think.