Chinuk Wawa <https://en.wikipedia.org/wiki/Chinook_Jargon>
a trade pidgin with a simple vocabulary of several hundred words.
in common use in the Pacific Northwest a century and a half ago, and still appears in many place names.
A few terms even made it into common usage, many by way of the labor movement.
I didn't invent the input method but this design I came up with can be manufactured at a scale large enough for satisfying the demand in the entire Toki Pona community.