Re: Classic Multibit 0.5.18 recovery with 16 words passphrase help please
However, if we know that the Classic version did not have the ability to create a seed, and that the HD version had a seed of 12/18 words, I wonder how it is possible that you have a seed consisting of 16 words 
Could it be 15 words plus a passphrase?Nicky, is there ANY word from your seed phrase that isn't included in this list: https://github.com/bitcoin/bips/blob/master/bip-0039/english.txt ? (You can search the list with Ctrl+F5)