I've seen a dictionary that defined 120 words using those same 120 words (morphemes really), though some of the definitions were a bit ... weak. Toki Pona also

I've seen a dictionary that defined 120 words using those same 120 words (morphemes really), though some of the definitions were a bit ... weak. Toki Pona also has about 120 words but it's a very different set of words: Toki Pona's vocabulary is concrete and everyday, while the dictionary's was very abstract. So probably it's just a cute coincidence that both numbers were about 120.