Bip39 Seed. Although you'll find BIP39 wordlists in languages apart from English, it can be strongly not recommended to use non-English words for wallet backups. It would make restoring the wallet tricky or not possible. BIP39 specifies a list of 2048 words from which the mnemonic phrase is decided on. https://bookmarksoflife.com/story4939285/bip39-generator-https-linktr-ee-bip39-the-best-side-of-bip39-mnemonic