The thing I can do best is read in these languages now. German is actually the easiest to pronounce but it's the hardest to form complex thoughts due to grammar differences. I can form basic sentences to say, though my pronunciation especially in French isn't great. It's when fast conversations, particularly debates or arguments, that is tough. So if someone speaks clear and deliberality, I can understand a large portion of what is being said. These apps will never make you fluent though. Using another app that is flashcard based like memrise or anki in tandem with duolingo is the best way to do it imo. It isn't great for memorizing vocabulary. It can sound like a garbled mess until you learn to break it down into what each of these mean and then it's not too hard. For example German is real big with combining words and emphasizing prefixes and suffixes. It also is helpful with learning how to hear a language. It is really useful for teaching you the very basics of how a language works. So like studying German from French, Spanish from German, English from Spanish, etc. I've finished the Spanish, French and German courses and have started working on those courses now from the other languages.

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