The substitutions in Geoffrey's chart are rational.
The most discomfiting part is the great flexibility in the vowels, and the status (in Geoffrey's chart) of d as both vowel and consonant (this happens with "y" in English but it makes it difficult to know if the substitutions are real or chosen for convenience to create words).
In other words, it's hard to check the integrity of a system that has that much freedom. It needs to be done on the basis of a large block of text. I don't think it will help much on labels, I can turn the labels into several languages without too much difficulty. It needs to be something where the grammar can be evaluated in some reasonable way.
- For example, I do see substitutions like t/th/d (both hard d and soft d, as in thorn) quite frequently in manuscripts.
- Also, k and chi are frequently substituted.
- Likewise pi and beta, and not just in Greek, but in numerous languages (psi I'm less sure of).
The most discomfiting part is the great flexibility in the vowels, and the status (in Geoffrey's chart) of d as both vowel and consonant (this happens with "y" in English but it makes it difficult to know if the substitutions are real or chosen for convenience to create words).
In other words, it's hard to check the integrity of a system that has that much freedom. It needs to be done on the basis of a large block of text. I don't think it will help much on labels, I can turn the labels into several languages without too much difficulty. It needs to be something where the grammar can be evaluated in some reasonable way.