Bip39 Rules. Regardless that it takes advantage of BIP32 strategy you could even now import BIP39 seeds into Electrum wallet. Also in addition to BIp32 There may be BIP44 Model which some wallet use for your technology of seeds. These words are pulled from a specific list of 2048 words. https://socialstrategie.com/story4626733/seed-phrase-generator-reddit-the-2-minute-rule-for-seed-phrase-generator-and-balance-checker