I think more comparable examples might be: The symbol for 1 in different orthographies, such as: 1 I ١ ― 𒐕 一 etc ... The words for father/mother are often a

I think more comparable examples might be: The symbol for 1 in different orthographies, such as: 1 I ١ ― 𒐕 一 etc ... The words for father/mother are often a bilabial and open syllable combination regardless of language family origin. The point is that while the details of the languages (sign, oral, written) could be different, there are some human affinities that make provide commonality. Another meta-pattern might that common words in many languages are often monosyllabic, though this is less universal than the two examples I gave above AFAIK.