Bip39 seed phrase checker https://www.plurk.com/p/3hf2syltjx It truly is important that the mnemonic sentences are generated from randomly selected numbers! These numbers could be created in many different different ways, that are explained in other article content here, like "What is an RNG" and Seed Phrase Era. The BIP39 word list https://minibookmarks.com/story20580546/bip39-checksum-word-5-tips-about-bip39-checksum-you-can-use-today-https-dzen-ru-bip39-phrase-com