Bip39. While you will discover BIP39 wordlists in languages other than English, it is actually strongly not suggested to implement non-English words for wallet backups. It'd make restoring the wallet hard or extremely hard. tell your wallet How to define your cash guiding it in the tree and are described https://followbookmarks.com/story19076541/bip39-wallet-https-linktr-ee-bip39-bip39-word-list-pdf-no-further-a-mystery