Bip39 Checksum. The seed phrase is often converted to some selection and that is applied since the seed integer to some deterministic wallet that generates all of the crucial pairs used in the wallet. Coin assistance really should be properly documented or referenced on the wallet developer's Internet site. Yet https://directory-nation.com/listings13304186/bip39-python-https-linktr-ee-bip39-the-greatest-guide-to-bip39-checksum