I do know what I am talking about regarding cryptography, it is my job. Explain to me what is wrong with my explanation if you know it better.
Ok, answer the following for me:
1) Can you tell me the key length of the private key of a wallet?
2) Can you tell me who "chooses" the private key - the "wallet" or the user?
3) At which point does the redundancy of the language come into play - a) upon private key generation or b) when a user decides to encrypt his wallet with a password of his choosing?
4) After you have explained 1-3 can you explain the relevance of the users wallet password and redundancy of a language to the private key in the wallet and how you will derive the private key of the private/public key pair from the public key if you happen to obtain the users wallet password from a rainbow table of some sorts that you are referring to?
Sure I can:
1) The lenght is 256 bit or 32 bytes if you like, which results in 16^64 or 2^256 possibilities.
2) The input for the hash function that produces the private key can be from human input or from a (strong) random generator (that is built into the wallet)
3) If I understand this question right (bit of a language barrier): In both situations
4) It is not about getting the users wallet password with a rainbow table. See answer 2 where it is possible to have human input (so called brain wallet) for the hash function that results in the private key. Those can be brute forced with a rainbow table. Also see the details of the sausage example.