Good question! 🤔 I’ll have a look around 👌

@prologic@twtxt.net Not sure what’s wrong with that script, everything looks like it should work…

hacked this up in python that does roughly what you wanted

https://gist.github.com/ShreyanJain9/29438d5dc0ebf58d28fc57dd585621e6

@prologic@twtxt.net Not sure! I have a feeling it has something to do with yours possibly not converting to-or-from UTF-8?

Another thing I noticed - the Python implementation cannot handle 512-bit keys. Not sure if this is a limitation of the library or of BIP-39 itself.