Language/Multiple-languages/Culture/Ideas-about-language-learning
This is for expressing your ideas about language learning.
Everyone may say something under its username. And generally do not delete other users' content.
GrimPixel
Website of visual dictionary
I have seen three books:
5 Language Visual Dictionary
The Firefly Five Language Visual Dictionary: English, Spanish, French, German, Italian
Merriam-Webster's Compact 5-Language Visual Dictionary (English, Spanish, French, German and Italian Edition)
So I think there can be a website can provide such a service, even better. Better if it is well-funded and be free of charge. I don't expect Duolingo to do that, at least before it makes its new courses acceptable.
Tutorials of languages
I have seen two channels on Youtube:
https://www.youtube.com/user/ProgrammingKnowledge
https://www.youtube.com/channel/UCfx2dro_w4_MyA19Nm5badg
providing "tutorials" about programming languages such as C++, Java, Python, which last several hours. So I think somebody may give such "tutorials" about human languages.