Is there any protocols to identify what sort of document MS-408 is?

[Pointless..]

Conversely, if h0 is greater than h1, one can lower h0 without changing the length of the message by encoding each letter with a simple cipher that depends on the previous letter.  For example, suppose the plaintext strictly alternates between the "consonants" K,T and the "vowels" A, O, and KA,KO,TA,TO  have the same frequency (~25%).  Then h0 will be ~2 bits/letter but h1 will be ~1.  Then one can lower h0 to ~1 by replacing K☛A, T☛O except at the first letter of each word.

Can we say that a low H0 is not itself evidence of low information content or of non-language? 
An encoding choice can easily depress symbol-level entropy while keeping the overall information rate of the message completely intact—effectively just redistributing how that entropy is packaged.

Would that be also a correct interpretation of the above?