Ah yes! One of my hobby horses - language.
What we tend to forget, or perhaps don't even know about American English, is that it has preserved in general usage a number
of ""old fashioned"words. Diaper is one example.
Early in its history America was absorbing immigrants from many backgrounds. Many were illiterate and so spelling and grammar were
not always correct.
Language is changing evolving thing. Who wants to spend decades, as was done by the French Academy, to define the meaning of a single word?
How many are aware that commonly used words today are derived from words that have a different inference? Look at fantastic and terrific.
I don't like the word dado. It just seems odd.
As for slot we think of a narrow trench. It is actually a Scottish word tio describe the gap between a woman's breasts.