There is another tool that you can use to brute-force the wallet passphrase it was developed by Coding Enthusiast.
You can check that tool from his thread below
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https://bitcointalk.org/index.php?topic=5214021.0Once you downloaded it just go to Missing Mnemonic Passphrase and try to brute-force your wallet just make sure that you remember some parts of your passphrase to speed up the process.
Thanks. I did try this previously however I couldn't quite understand the alphabet use case. I tried it anyway and it had crashed when I woke up, lol.
I couldn't get it working on a Macbook unfortunately which would have been way faster vs. my Windows laptop.