[graeme]

Have you learnt a language? Important qualification to comments in this thread.

I’ve learnt languages with immersion and Pimsleur. Sadly I haven’t found Duolingo useful at all. The effort to actual useful knowledge ratio is high.

Other helpful resources: Assimil, Anki, and Conversation exchange. Mundo Lingo is good for that if they have an event locally.

[Fnoord]

Anki is great for learning (and allows the same spaced repetition), and AnkiWeb allows proper synchronization, but you gotta maintain and build your own deck (which itself aids you, but is a lot of work with things like pronunciation) or use another amateur's build deck. The power of Duolingo is that it reuses SVG artwork, and that the TTS engine plus voice sets work reasonably well.

[jddj]

As someone who followed the same method (DuoLingo for vocab, start reading, start talking) and now speaks a second language fluently, I'm not OP but I'll go ahead and vouch for their comment.

[graeme]

Great! Did you complete the tree, or just do some then switch to reading and talking?

[jddj]

Completed the tree, but admittedly it was shorter back then.

I also did it in parallel with the Language Transfer podcast, which I've mentioned on HN before but is an amazing resource for understanding how a new language works structurally and grammatically.

I did find Duolingo valuable, but purely for vocab.