Boris Johnson is known for speaking Latin fluently, and he also speaks French and Italian. I also believe he SHOUTS in English.
Rory Stewart is probably the most talented. He speaks Dari (a form of Farsi), plus nine other non-specified languages.
Jeremy Hunt speaks Japanese, even though his wife is Chinese.
Corbyn speaks Spanish. Two of his three wives were Spanish speakers; one from Mexico, and one from Chili, so I suppose it was essential. His first one spoke English.
Trump, of course, struggles with just English.
The only language, other than French (and Latin) which I've attempted to learn, was Italian. I would spend hours trying to learn useful phrases, but after about ten minutes they'd evaporate. It was as if my brain refused to absorb them. However, when I learn new words in French; they usually stick without any problem.
I shan't be attempting to learn any other languages.