+ reading_speed:
+ # label: 'Reading speed'
+ # help_message: 'You can use online tools to estimate your reading speed:'
+ # 100_word: 'I read ~100 words per minute'
+ # 200_word: 'I read ~200 words per minute'
+ # 300_word: 'I read ~300 words per minute'
+ # 400_word: 'I read ~400 words per minute'