I'm pretty sure that's not the way it works. You can go from mnemonics to pk, but not the other way around.
Any way to generate the BIP-39 12 or 24 word mnemonic from the nsec or hex key? I looked at https://nostrtool.com/ which is great but doesn't seem to do thus action. #nostr #asknostr
Discussion
Hmm, okay. I'd think it'd be bidirectional but I don't know. When I first made my keys, I didn't know of a tool like nostrtool.com that generates seed words AND nsec. So, I just have nsec yet wish I had words too for backup purposes. Another reason I wish it were possible to "transfer" everything from nsec-1 to nsec-2. Oh well. Thanks tho.