Can I learn more than one language on Langua? And does it cost more to do so?

Whether you have the free or Pro version, you can easily switch between languages on Langua. There is no extra cost for learning multiple languages. You can go to Settings in Langua and change the language, then save. You'll then see content in the updated language, and your flashcards will also only show words/sentences in that language. If you're also using Communicate (AI chat), when you check past conversations, you'll see chats from both languages there.

Note there is also a Settings page available in the tutoring section of the site. If you change the language there, it won't update Langua.