I thought I learned at one point that “kaka” (poop) was one of the earliest proto-Indo-European words [0] and think it is present in many languages but “all” is a pretty high bar.
[0]: https://www.reddit.com/r/linguistics/comments/8lefir/why_doe...
[0]: https://www.reddit.com/r/linguistics/comments/8lefir/why_doe...