Bip39 copyright https://zenwriting.net/keenanctdp/how-to-create-a-bip39-seed-a-step-by-step-guide It really is important that the mnemonic sentences are produced from randomly picked numbers! These numbers is often created in a number of different ways, which are described in other article content here, like "Precisely what is an RNG" and Seed Phrase Technology. As an example, in https://webnowmedia.com/story5665947/bip85-vs-bip39-a-secret-weapon-for-bip39-mnemonic-code-converter-tool-https-cutt-ly-uryc5rw7