I'll save you some time, though. Essentially, researchers showed babies tapes of a bilingual individual speaking English, then switching to speaking French. After a certain age, monolingual babies were unable to pick up on the switch, whereas bilingual babies were able to detect when the speaker switched languages. Oh, did I mention? The bilingual babies were Spanish/Catalan bilingual. In other words, they were able to pick up on someone switching from English to French, while neither was their native tongue, indicating that being bilingual preserves elements of the language recognition portion of your brain.
I've heard good things about raising kids bilingual, however since my wife has the same mother tongue as I we decided against it. I envy the people who have the option.
Also, there's no reason you can't start your child young with a second language. The French, in particular, are more than happy to train your child in French from a very young age pretty much no matter where you are in the world (search for Alliance Francaise). My wife and I have different native tongues, and we intend to have our child go to a school where the language of instruction is a third different language. We have friends who have raised their son speaking French, Spanish, English, and Turkish. He is now learning Mandarin and is the most articulate 8 year old you've ever met. It really is worth the effort.
I'm a software developer. My previous gig was at European aerospace company, and my current gig is at international financial institution. At both of these companies there's a wide range of languages spoken, and being able to converse in other colleagues' native language can indeed be useful. Both of these employers see languages as a desirable, but not essential, skill.
I find some language - and phrasing quite revealing and beautiful. I love listening to other languages - even if I don't understand them.
For example, I might consider learning Mandarin. China sure is fascinating, but I sure as hell wouldn't like to live there. So what would I gain, really? The ability to read some fascinating ancient texts. OK - but as I said, I can imagine better uses of my time.
What would be a an interesting country to immerse in? Most Spanish speaking countries are poor and dangerous. The muslim world suppresses women and is also dangerous, and I could get killed for twittering. Russia? Also too poor, cold and depressing. Japan perhaps, but it is a rather small island and I am probably too tall to ever live there comfortably.
I already live in Europe and there are other European countries I like, but not enough to learn the languages. If I were to move to some obscure EU country, I would of course try to learn their language. But it seems unlikely atm, so why bother?
I think culture transcends the state. The citizens of a country don't necessarily represent the state do they?
What would be a nice country to visit? That is my question?
Take China - it is fascinating, but they don't have free speech and lots of death sentences. That makes it very unattractive to me. Even if I could meet interesting people there, chances are the interesting stuff would be illegal to say. So if I talk about it, I put myself at risk.
At other countries, you don't even meet women on the street. Sure, they might be really nice, but why do all the work to get beyond "culture"? In a lot of countries, if I talk to a woman her brothers might set out to kill me. Additionally, I am not keen on any kind of religion to begin with.
I wrote my rant in the hopes that somebody would come up with a good reason to learn a language or visit "challenged" countries.
I am aware that the Euro zone is a small bubble of moderate happiness on a sea of misery. I am lucky - but why should I leave the bubble and put myself at risk? Or even if I don't put myself at risk, chances are I am just taking advantage of some poor people (because I would travel to some holiday resort because it is so cheap).
Unfortunately historically culture tends to be all about suppressing women, among other things, I am just not into it. It is a set of rules, why should I force myself into it? I want to be free from culture, and I want to meet people who are free minds.
Can you name one worthwhile culture to get to know, and why is it worthwhile? Apart from scientific studies, which are fascinating, but not my line of work.
Clothes are the same all over the world now. Food you can also get a huge variety in most major cities.
Nothing against traveling to the odd country, but then again it is questionable if traveling to some country once for two weeks warrants investing years to learn their language.
Those of us in the 'west' are doing this anyway through food and goods. Sounds like you'd prefer some kind of ethical tourism.
As a note of optimism, history is there to be learnt from. Not very long ago did we see women and blacks oppressed in the so called civilised world.
Also I admit it frustrates me if people study that kind of thing instead of productive things. Where I live people even go to university studying languages for years. Sorry, but things like engineering simply seem more productive to me, just my opinion. If all those people can find jobs as translators and are happy with it, whatever.
I recently heard of a friend of a friend who is translator for the Spanish envoy and get's to dine with Angela Merkel (German chancellor) occasionally. Might be interesting, but I personally wouldn't dedicate my life to achieving it. That's just me.
For many employers the subject someone studies is moot, it's the skill sets built around the study that are important. Showing that you can apply yourself to something.
Not that I want to poo poo your idealism.
Incidentally, isn't that part of what Hacker News is all about?
Also I wonder how hard it really is to learn a language, with the proper memorization techniques.
Edit: To the downvoters: I was expressing my personal opinion, that for me it seems like a waste of time. If you enjoy learning languages, more power to you. But be tolerant of other people's opinions, if you can.