I have enough problems dealing with the English language. I think you deserve a Victoria Cross for bravery in attempting to convey the connotations and idiosyncracies of computer concepts and usage to persons in a language foreign to your own tongue.
I do think the retailers have a lot to answer for regarding PC related usage problems. All they are mostly interested in is making a sale, and mis-lead buyers into thinking it's as simple as ABC. On a few occasions I have "dumbed myself down" when talking to such sales personnel, so they'll open up. And it's amazing some of the utter garbage they are handing out.
Fortunately, IMHO, (or unfortunately, depending on your point of view), with modern education, you can't even finish primary school without a basic knowledge of PCs. And for those who complete high school, you couldn't survive that far without a thorough working knowledge.