@javier For all those who learn from English and are not native speakers. It would be interesting for the Lingvist algorithm to ask what is our mother tongue while waiting for specific courses to be developed. Thus, even if we learn from English, for example Spanish and our mother tongue is French, the lingvists statistics would not mix native English and native French in the English>Spanish course. This is important given the different difficulties or facilities between an English, French or Italian who are learning Spanish for example. This will improve the Knowledge Mapping work if I understand how it works (https://lingvist.com/blog/science/2018/02/16/is-there-a-map-for-learning-a-language/).

French>Spanish
And the absolutely necessary for linguistic justice :
English>Esperanto

@truelibertarian There are 59 languages in Wikipedia that have more than 100,000 articles, which gives us a good overview of the most common languages in the (digital) world. If I am not mistaken in calculation, it takes 59*58=3422 language pairs to create if lingvist wants to be representative of the languages spoken on the internet.

Well, if we are less ambitious, let's take the languages that have more than 200,000 articles, there are 41*40=1640 pairs (but we lose then Lithuanian, Croatian, Chechen, Estonian, Slovenian, Slovenian, Galician, Greek, Norwegian, etc.). And with only 41 languages (1640 pairs), it would still be impossible for lingvist to create all these courses before 150 years if they create more than 10 courses per year!

The example of Wikipedia has long since shown that the collaborative system is the only one capable of meeting the immense needs of our world (without necessarily losing quality).

Putting in place an intelligent system with official courses and courses offered by the community would be the optimal solution and the only one capable of making a tool such as lingvist realy popular.