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?

Another European example is Finnish which has yes but not no.

No in Finnish is ei, similar to Estonian ei or Swedish nej.