"When most of us think about taking a language course, we’re picturing a classroom full of wobbly desks and chalkboard dust, plus a three- or four-digit tuition fee. For those who are looking for all the structure and formality of a traditional course but aren’t sure about stepping back into the classroom or forking over those fees, check out some of these free online language courses, available in nearly as many languages as there are learners.
EdX is one of the biggest MOOC (massive open online course) websites out there. You can find a lot of college-level courses here, created and taught by actual professors from top universities. As a language learner, you can consider taking a dedicated language class, or if you’re more advanced, taking a course in your target language. For example, right now you can sign up to take an algebra class entirely in French!
You can actually earn college credits on EdX, through Arizona State University. Some of the courses have certificates you can get for completing them. In general, it costs money to get a verified certificate for completing a course (so make sure you check the details before you sign up), but many of the courses themselves are still free.
The courses offered on Coursera are run by professors from world-renowned institutions, and it’s even possible to earn a certificate from many of the courses.
Coursera, another big name in online education, also maintains a Language Learning section under its online catalogue. Many of the courses will be geared toward beginners, like First Step Korean, and others will engage more generally with language learning, like the Miracles of Human Language course from Leiden University. Still other classes are taught on other topics in foreign languages, so you can learn about writing, math, engineering or literature in the foreign language you’re learning—though this approach is recommended for higher-level learners.
On Coursera, there are currently 122 classes taught in Chinese, the second most common language after English, and a long list of other languages trail after. Spanish has 79 classes. French has 41 classes. You get the idea. There are a ton of classes out there for you to try. You can even learn about entrepreneurship in Khmer!
Whatever you find here, it’s coming from a respected university or educational institute, and if it’s not on offer now, sign up to get an alert when it is!"
Source: https://www.fluentu.com/blog/free-language-learning-websites/