@Real Music,
Piggy has been learning English for more than thirty years. But I don’t think I can “take part in casual conversations in other languages”.
Yes, schoolboys always are “looking for useful learning (techniques) of learning to speak another language.” But seems no one could be “successful”, including piggy himself thirty years ago…
Yes, “we all have different ways of learning”.
Living in the exact environment or say practice might be the best way to learn (speak) other languages. No “quickest and easiest techniques”, I think.
When piggy was a schoolboy, piggy found an interesting phenomenon: some classmates can speak Chinese much better than me, although they achieved bad scores in math and physics…Sometimes when they spoke some newest terms and words (which just popped up in society), piggy used to be puzzled and had to guess what they were talking…
Have a lovely day.