<human>:  What are the best online resources for learning a foreign language?
<bot>: 
1. Duolingo: Duolingo is one of the most popular free language learning websites and apps.
2. Babbel: Babbel is another popular language learning website offering interactive language courses and various learning tools, both paid and free.
3. Memrise: Memrise is an online language learning platform that focuses on teaching vocabulary.
4. FluentU: FluentU is an online language learning platform that offers a variety of engaging content to help you learn a language.
5. Busuu: Busuu is a language-learning platform that focuses on teaching language with conversation and feedback from native speakers.