Most of these just seem like basic educational issues except this one imo:

Every language has words for yes and no.

I want to see more than like 1 or 2 counterexamples. I’m pretty interested in linguistics on an amateur level. Don’t believe I’ve heard of that one before now.

@TrickDacy @rimu but use them much more restrictively. As an example in Thai, "yes" is "chai", but is used only in a few situations, like if a question is ended with "chai mai" (yes followed by word forming polar question).

In interfaces you can't usually put this as yes/no buttons, but rather usually one is a verb like "khao" ("come/go in") and the other is the same word prefixed with mai ("not", different tone from the other "mai" i mentioned).

Chinese is similar but I don't know it as well.

@TrickDacy @rimu another example is Irish, which I've heard claim as an explanation for Irish English also contains more of "it is/isn't" and such constructs in favour of yes no.

Another European example is Finnish which has yes but not no. You want me to go on?