English is a complicated language drawing from many different sources. It is easy to sound foolish or ignorant, especially if you are trying to sound smart by using (and misusing) some of these common phrases.
What is the difference between "e.g." and "i.e."?
The abbreviation e.g. stands for the Latin exempli gratia, or "for the
sake of example." It means exactly that; a series of examples. The
abbreviation i.e. stands for id est, or "that is," and explains the
subject you have mentioned.
What is the difference between et al and et cetera?
The Latin phrase et al, short for et alia (and other things) and et alii (and
other people), is more specific than et cetera (and the rest). Only et al can
refer to people.
Amitiés
Mahmoud Chawki