Fred is a child.  Learn Stuff!

Playing with guests
[31, 45, 50, 21, 33, 28]
Average age = 34.666666666666664
Younger guests: [('C. J. Cherryh', 31), ('Isaac Newton', 21), ('Dorothy Sayers', 33), ('Oscar Wilde', 28)]
Older guests: [('Conan Doyle', 45), ('Marie Curie', 50)]
Youngest guest(s): ['Isaac Newton']
Oldest guest(s): ['Marie Curie']

Czech morphology 😱
jeden - jedenáct
dva - dvanáct
tři - třináct
čtyři - čtrnáct
pět - patnáct
šest - šestnáct
sedm - sedmnáct
osm - osmnáct
devět - devatenáct
deset - dvacet

Onomatopoeia

Just Korean
[('개굴개굴', 'gaegul-gaegul', 'Ribbit (frog sound)'), ('멍멍', 'meong-meong', 'Woof (dog barking)'), ('야옹', 'ya-ong', 'Meow (cat sound)'), ('딸랑딸랑', 'ddal-lang-ddal-lang', 'Jingle (bell sound)')]

Just Latin+
[['gaegul-gaegul', 'meong-meong', 'ya-ong', 'ddal-lang-ddal-lang'], ['wāng wāng', 'miāo miāo', 'huā lā lā'], ['meo meo', 'gâu gâu', 'ục ịch', 'ro ro'], ['guk guk', 'meong', 'kring kring'], ['wan wan', 'nyaa nyaa', 'piyo piyo', 'goro goro']]