Which got me thinking: How exactly did our ancestors learn other languages? In an exploratory way, I mean, like discovering a civilization for the first time that spoke a foreign language and were quite hostile to the intruders due to lack of understanding them mixed in with fear.
I know this is probably just me being an idiot, but I really cannot understand how someone could learn to communicate with someone that speaks exclusively in a different language, just by listening to them speak for a while. Whenever I attempt this, it sounds like gibberish with a meaning that I cannot understand due to ignorance.
And after that, how did these linguistic pioneers properly record the translations? Different languages have different phonetics, right? So how would they have correctly established a way of conveying to the simple-minded population of their home country the spelling, grammar and pronunciation of a different language? And likewise for the other people? I'm thinking the answer to that is that they didn't find a way for idiots to understand, because here I am, rambling about how I'm so confused with all this.
Basically, TL:DR, how do people learn and communicate another language, and educate how to communicate in this language to dumb people?