> It's not like we colour words in a sentence based on their type, All of today's human languages were developed in a time without computers, pens (and their p

> It's not like we colour words in a sentence based on their type, All of today's human languages were developed in a time without computers, pens (and their predecessors) have trouble switching ink color for every word. If goose quills and inkwells could change color as easily as computer monitors, I bet there would have been at least a few languages that use color to denote meaning.