What is the value of learning a second language aside from the obvious practical benefits : the fact that you can talk to people who don’t speak your first language, can read things which have not been translated, can politely talk to people who don’t find it easy to speak your first language and can read things in the original.
When I was in high school adults tried to convince me to try to learn a second language by claiming that it broadens the mind. They failed. Since then I have, more or less, learned Italian. What have I gained ?
My impression is that my mind reminds just about as narrow as it was before.
I asked Elisabetta Addis (the woman to whom I am married) what she gained from learning English. She said it was very useful, because by learning a second living language she learned that there is more than one way to structure concepts, that is that the structure of Italian is not the structure of truth, but is rather just one of many equally valid structures developed for historical reasons. I confessed that I have had the impression that Aristotle was not always totally clear on the distinction between his immense contributions to understanding Greek and to understanding thought and logic and would have confidently claimed that true though was only possible in Greek. I was as usual speaking from ignorance.
Trying to understand my different impression, she suggested that math is, for this purpose, like a second language (she learned English and math beyond a fairly elementary level simultaneously and imagine how fun that was).
I said that I suspect that part of the reason is that no one could possible mistake the structure of English for the structure of truth. Partly, of course, English spelling is totally arbitrary and makes no sense. Also English is not logical because it is part German and part French. For example to find if a claim is true one verifies it. Or steer meat is beef and sheep meat is mutton. That is, since English is a weird hybrid, English is its own second language.
If so, this is important, since the only people who have a choice about learning a second language or not are native English speakers.
My unassisted thoughts on the topic below the fold.