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?
You might find this video interesting:
https://www.youtube.com/watch?v=P1houMl12OU