Communication as a focus

I've been wondering about a communication focus as a non-violent pursuit of a magus.

It might include

  • talking to things (trees, tables, rocks, birds)
  • speaking/understanding different languages
  • long distance communication (but how do I exclude long-distance scrying from that?)

I assume it would be major as it is.

These are the things I am wondering about:
How would I define its boundaries?
What would a minor communication-ish focus do?
Is there a cononical focus like that that I have forgotten about?

At my table that focus would probably fly.

as for minor foci, what about:

  • Send messages over long distances.

  • Communing with nature.

  • Understanding (spells to translate, but also spells to foster an atmosphere of understanding and willingness to understand).