A fun way to learn new languages is a chrome extension for having dual subtitles on Netflix movies. I find it’s a good way to pick up slang and idioms of the target language.
His net worth is tied to Tesla, he would have to post his stock as collateral. If he fails to make good on the interest payments they can take it out of his equity. If tesla stocks drop dramatically, there could be a margin call that could put Twitter in a precarious situation.