I'm trying to find Electrum's word list / dictionary and its values in HEX in order to manually convert a Bitcoin private key into 24 words. Considering Electrum's popularity, it's probably the best choice, so that even in case I lose the dictionary I will be able to retrieve it at any point in time.
Thanks!
Note that the seed to mnemonic function does not do a simple number to word conversion. It takes into account the previous number too.
And if you are looking for an offline conversion system then use the existing tools out there. Two that come to mind are:
https://bitcointalksearch.org/topic/python-bitcoin-ecc-library-supports-signing-transactions-determinstic-wallets-271343
And genjix's sx tools.
You can also use Electrum itself. The library part of it can be used separately from the client.