For example, in English the word right (opposite of left) and right (privileges, as in human rights) are homonyms. In Spanish, derecho/a also means both of those things. Don’t the concepts behind those words predate the cross-pollination of the two languages? Why do they share this homonym quality?
As an Arabic speaker, our graphs also go from left to right. That said for some reason our number are written from left to right for some reason.