The problem with the 12c Platinum, is that it was a "ground-up" rewrite, and is actually slower than the early 80s 12c.

It’s slower? Any proof of that? I believe it is slower than the most recent revision of the 12C, but it’s certainly faster than the original 12C. The Platinum has many more registers which I find outweighs the improved speed of the current 12C. The stack push behavior of the Platinum also helps make programs a little shorter from my experience.

So the choices are "English" or "Platinum"? I guess English is a color scheme and/or material?

I think English just refers to the language for the package labels and manual. Nothing to do with the calculator itself.

> I think English just refers to the language for the package labels and manual. Nothing to do with the calculator itself.

They should make a calculator that works with English natural language numbers:

    compute eight plus four
    twelve

They do, it's called "COBOL."

At first I thought it referred to the comma as a decimal separator, but then I remembered the English also use a period.