Bip39 Checksum. Though you'll find BIP39 wordlists in languages in addition to English, it truly is strongly not recommended to work with non-English words for wallet backups. It might make restoring the wallet hard or impossible. BIP39 specifies a list of 2048 words from which the mnemonic phrase is chosen. https://wavesocialmedia.com/story4517505/bip39-word-list-https-linktr-ee-bip39-top-latest-five-bip39-list-urban-news