It seems somewhat frivolous and likely to invites a family of similarly frivolous questions like "could a programming language be based on cats"
I feel that a less frivolous version of this question would be something like "what are the pros and cons of a language using fonts to distinguish variables" or similarly in reference to prior art.
On the other hand questions about esolangs are (as far as I know) considered on topic.
Should we close such questions and is the close reason of "needs more focus" correct?