This is a more focused follow up to a question I had the other day about moving to other countries. I’m wondering what the best options are for learning a new language at the moment. I’m vaguely aware of companies like Duo-lingo losing their reputation lately and it’s hard to trust the top google results nowadays with all the SEO junk. So does anyone have suggestions for trustworthy/useful sites for learning a new language? If it matters, in particular I’m interested in trying (In roughly this order) Vietnamese, Chinese, Japanese, or Spanish.
A good grammar book (series), flashcard decks with example sentences (not only vocabulary) and audio by native speakers e.g. from , native media of your choice with subtitles, for some you might be able to use dual subtitles in both your and the original language (some local media players support that, or e.g. ).