It's not meaningful at all. The list would just be constructed entirely from right to left. The "first" item in a pair would be on the right, and "car" would just mean "item on the right of a pair", or "first item in a list".
Are you also writing right-to-left, then? If everything about the system is reflected (including having a reading order of right-to-left), then you're right, it's not meaningful. But it's also not what's proposed in the OP here. When the two-dimensional text on the screen is re-formed into a linear string, it is the right end of line N that is attached to the left end of line N+1, and so the right-hand arguments of functions are "after" the left-hand arguments.
