Bip39 Standard. Entropy values has to be sourced from a powerful source of randomness. This implies flipping a fair coin, rolling a good dice, sounds measurements and many others. Never use phrases from guides, lyrics from tracks, your birthday or steet tackle, keyboard mashing, or everything you believe is random, https://glowingdirectory.com/listings13084669/bip39-python-https-linktr-ee-bip39-not-known-details-about-bip39-compatible-wallet