Bip39. Whilst you can find BIP39 wordlists in languages besides English, it can be strongly not advised to implement non-English words for wallet backups. It'd make restoring the wallet challenging or extremely hard. words, or enter your own personal underneath. Mnemonics with less than twelve words have very low entropy https://bookmarkinglife.com/story4280649/bip-39-https-linktr-ee-bip39-bip39-wallet-fundamentals-explained