..................
I have tried using Duolingo to learn Italian before a trip last year, and learned a little. Much harder in your late 50's. I was able to have a full conversation with a cab driver who spoke almost no English in Sicily last year. We just used Google Translate on the fly. Worked great. I may never learn more than the pleasantries and a few food words, but at least I try.
Sadly, many don't...
I had schoolboy French and German, both as a very reluctant student!
In 2000, I got a job that required me to travel all over Europe and work with colleagues over there. There are 16 languages in Europe (never checked what I was told, but it sounds about right) and there was no way that I was about to learn that lot (Greek, Bulgarian, Swedish, ... anyone?) But the Brits are blessed with a legacy from the days of Empire; English is the most widely spoken language in the world. It is also blessed with a strong cultural identity and exports music & TV, and the written word is exported widely.
I decided to speak English as well as I possibly could and rely on that legacy to get through.
I got rid of dialect words, spoke more slowly, used shorter words and sentences, gestured a lot, used pictures and drawings. I tried to avoid using idiom - but if I
had to use idiom, I used the whole thing (idioms are cultural and a short form will mean nothing, but all of it may convey the meaning). I survived six years of it and received good feedback from a variety of sources about my ability to communicate.
One of my colleagues was a Belgian and he spoke five languages: Flemish, French, Dutch, German and English. He was fluent in them all and could be on the phone in one language and be holding conversations with two other people in their different native language, none of which were his! He was very good at all five, as far as I could tell. It seemed that he was a natural linguist. I was once in a taxi with him in Brussels and he noticed that the driver was Spanish, so he gobbed off a stream of what sounded to me like fluent Spanish. The driver responded enthusiastically and they gabbled back and forth for a few mins. I said that I didn't know that he could speak Spanish. He replied that it wasn't one of the ones he claimed because he wasn't fluent. I asked how many others he had? In addition to Spanish, he also spoke Arabic, Russian and Mandarin ("although I'm working on that one!")
Chuffin' eck! NINE languages!
I commented that I was amazed that his brain wasn't full to overflowing and had no room left for new stuff. He merely replied that he was a bit slow in the mornings!

What I saw was that he lacked a sense of humour and I never saw him laugh, not once in the 12 years that I knew him. Maybe his brain
was full.
Nine languages, that must be a record of some kind. He only needed one for his job, he chose to learn the others.