I love languages, I think they’re fascinating things. However, being born and bred in England, where everything is in English and pretty much everyone speaks English all the time – in person, on the TV, on the radio – I had far less exposure to other languages than I would’ve liked, in retrospect.
While I don’t think this is a foolproof excuse for being monolingual (lots of British folk do learn more than their mother tongue), I think it’s a factor in how few of us learn and speak other languages confidently in the long term. It’s much easier to learn through immersion (being surrounded by a language) than picking up a book and listening to a tape, so English filtering into everyday life in other places must be a factor in locals’ ability to pick it up. I assume.
Having studied Latin at school to A level, German GCSE and a bit of French when I was much younger, I do have a continuing interest in linguistics even if I haven’t used my aptitude to its full potential, which I do regret sometimes.