Learning more than one language at a time?
I see some people are learning more than one language at the same time. Is this a good idea, do you find it easier learning two at the same time? Or should I stick to one?
Yeah, one at a time makes so much more sense. Especially since you're studying German (the toughest language on here). The only reason you see multiple languages on mine is that I have studied/taught Spanish for years and Portuguese is very similar. Good luck to you!
I think you should stick to one at a time. I found going through the German course quite hard and time consuming. I would not have had enough time to start another language as well.
If you're learning your language from scratch, I would definitely stick to one at a time. This is especially true with Duolingo because you will learn many of the same vocabulary words in all your languages and 4/5 of them are so closely related that it's easy to become mixed up.
If you have outside knowledge of a language, I wouldn't count it towards this total. For example, I spoke French before starting Duolingo and have been learning Spanish in real-life classes. German and Italian are sufficiently different that (so far--I have only just begun German and am very beginner in Italian) I'm not having trouble learning them together.