Lesson 1 (31 words)
Lesson 2 (55 words)
Beginner (100 words)
Easy (500 words)
Medium 1 (1,000 words)
Medium 2 (2,000 words)
Difficult (3,000 words)
Advanced (4,000+ words)
Impossibly difficult!!! (similar words, eg 'hipi', 'hopu', 'hopi')
Years (eg '1840')