Is it a good idea? Will my brain cope? I was raised bilingually, and learnt Portuguese very poorly as a young adult travelling in Brasil (I had a good vocabulary, and could understand and be understood, but my grammar was terrible.) I'm trying to improve now 10 years later just using Duolingo. However I'm planning to go to France in July and thinking of switching to attempting some French to prepare, but with no real desire to become fluent. But I think I'm a bit worried that I'll just scramble the languages in my brain if I switch. Has anyone done similar? Any tips to store the languages separately in your mind? Or better just not to even begin with French, which has never come easily to me to begin with..?