Japanese, Chinese and Korean. Fluent in Japanese, can watch kdrama and mostly follow along and have basic conversations in Korean, forgot virtually all the Chinese I did but I managed to pass HSK2 after 2 months of study and then HSK3 the following month. I was only in China for 3 months on a work trip, so I thought I'd have some fun.

What do you use to learn different languages? Firstly, where you get your vocabulary from but also pronunciation and grammar?

Anki, Netflix, Preply and social clubs.

I start by front loading all the grammar study up to upper-intermediate level as fast as possible. Usually a premade Anki deck of a few thousand sentences will be available for this.

Vocab I pick up from native media. I just read or watch whatever I'm interested in, lookup words as I go and put them into Anki. I do full immersion and it works well as access to entertainment in my target languages is a key goal.

Pronunciation I pick up through a crap tonne of exposure to native media.

Conversation is through a combination of private tutoring and finding people who speak my target languages to hang out with.