Bip39 Vs Slip39. Though there are actually BIP39 wordlists in languages aside from English, it is strongly not encouraged to implement non-English words for wallet backups. It'd make restoring the wallet challenging or unachievable. Yes, BIP39 passphrases are case-sensitive. Ensure that you enter your passphrase specifically while you set it https://meshbookmarks.com/story18801488/bip39-generator-https-linktr-ee-bip39-bip39-words-an-overview