As I mentioned in my earlier post, what I mean is closer to semiotics [1], precisely because "language" is too fuzzy a concept and leads to the wrong conclusion. In that view, communication using posturing and changing color is obviously signalling.
As for minds vs. consciousness, etc. we'll just end up in a language game there which isn't productive. Personally, I am more interested in a more abstract conception of "attention" which I see as preceding "awareness" (which may or may not precede self-awareness). But again, how people use these words in different circumstances makes any discussion of the topics nearly impossible unless they are rigorously defined so as to avoid confusion.
But in a "food for thought" kind of diversion, not an argument or even really a point, consider you are walking through a forest and you see some berries and your mouth starts to water. There is some relationship between your attention, your awareness and some kind of information being communicated between nature and you. The berry is signalling something to you and your attention is drawn to it.
1. https://en.wikipedia.org/wiki/Semiotics