Overview of Duolingo Courses

For English Speakers:

36 courses and 56 trees
Language
Trees
Arabic
Chinese
Czech
Danish
Dutch
Finnish
Hawaiian
Hebrew
High Valyrian
Hindi
Hungarian
Indonesian
Irish
Italian
Klingon
62 skills (v.1) 62 skills (v.2)
Korean
Latin
Navajo
Polish
Portuguese
Romanian
Russian
Scottish Gaelic
Swahili
Swedish
Turkish
Ukrainian
Vietnamese
Welsh

For German Speakers:

3 courses and 3 trees
Language
Trees
English
French
Spanish

For Portuguese Speakers:

4 courses and 4 trees
Language
Trees
French
German
Italian
Spanish

For Russian Speakers:

4 courses and 8 trees
Language
Trees
French
Spanish

For Spanish Speakers:

5 courses and 6 trees
Language
Trees
French
German
Italian
Portuguese

The Lastest Updates:

Note: I no longer maintain these lists, sorry.