I don't understand what you mean by that. I've seen those links - in fact, I had found them on my own and read them before I posted my question. But what do you mean by saying that it doesn't start at a specific point? Where else could it start than at a specific point? The cursor is on one letter, showing a particular language, then I move one character and the displayed language is something else.

Where else could it be than at that particular point - the boundary between those two characters? Sorry if I'm being dense, but I just don't get what you mean.