Memrise is an app where you can find more than 200 languages. They are not just limited to English. Besides, they are assertive about their methodology, which is using flashcards with “mem”s. It is based on how our brain works.
It is very hard to not learn a word or phrase with Memrise because you have to answer correctly six times in terms of writing, listening, and choosing the meaning of it. There is so much to talk about, but if you wanna try it out yourselves, here is the link to the web page for the computers: