“On accident” and “study on . . .”
My children frequently say they did something, or someone else did something “on accident,” where I would say “by accident.” The “on” version not only sounds wrong to me, but it makes no semantic sense (what about the normal meaning of “on” could make it appropriate here?), but despite my having corrected them many times, they persist in this usage, which suggests it is entrenched in their subculture (Southern California Public Schools). I also came across the “on accident” form on the web recently. Is this idiom taking over? Would anyone care to defend it, or to suggest how it might have originated?
Also, as a college teacher in Southern California I have noticed a construction that might be related in quite a few student essays. This is “study on,” where I would just write “study.” For example: “Galileo studied on astronomy for many years.” Admittedly, this almost always occurs in essays that are poorly written in all sorts of other respects, but it is clearly not a simple mistake, as it occurs quite frequently, sometimes several times in the same paper. Clearly it is done intentionally. (Perhaps it is worth adding that many of my students are Hispanic and bilingual in Spanish and English. Could it be that “study on” reflects some construction or idiom in Spanish? Could that be the case for “on accident” too?)