lol, but more to the point, one communicates ideas, while the other communicates value. To communicate an idea you broadcast it (speech), to communicate value you must trade for it. Its more like a weight where you must have something on the other side of the scale for it to even be measurable. They have distinct ways to transmit the two different mediums. So really, you can't "buy language" for the same reason you can't "think money" or "speak heavy objects." But both are very costly to create and sustain, a cost that is absolutely worth it, as they allow society to exist. In fact, one could argue that language and money are quite possibly the two greatest emergent investments in human history. 🤔