I come from a culture which uses left-to-right language. In my mind, the following is true:
- On number line, negative numbers are to the left of 0, positive are to the right.
- In Cartesian coordinate system, X axis points to the right (same as number line).
- Limit from the left is '-' and limit from the right is '+'.
Does the same hold true for mathematicians who come from cultures using right-to-left languages?
I think this may answer your question:
Of course one example is not proof, but clearly the fact of writing right-to-left does not (even temporarily) cause people to see everything as the mirror image of the way left-to-right writers see it.
As comments have already touched upon, the best-known right-to-left writing systems are ancient (not just hundreds of years old, but based on thousands of years of tradition), whereas the mathematical conventions of number lines and Cartesian coordinates are much more recent inventions.