I wondered the same thing, then I did a quick Google search and it turns out they're relatively known in Mexico
They also have a web page: www.biyubi.com
I'm using Fennec F-Droid and can confirm this bug also affected me, and I really don't know if it can be solved without an update (which is not yet available, as it seems)
I once toyed with the idea of a machine-oriented spoken conlang similar to Lisp in "syntax" by reserving certain syllables for punctuation (brackets, etc.)
One of the main problems of existing solutions is that they lack flexibility due to the poor state of natural language understanding, which is solved by pretty much removing natural language from the equation. However, it would be unusable for most people, or at least would have a learning curve too steep for it to be practical.