If all the residuals are 0, it is a direct substitution (no glyph ciphers more than one letter). It could be, but there is no good direct substitution up to now.
Yes, for example, the languages should start words with a couple of letters, not with many letters. Now with latin I have residual with "qo" substitution of 5 (this means "qo" ciphers up to 5 letters at pos1, too much starting letters in the natural language input). I have tested in old catalan just to play (catalan has less startin letters than latin) and the residual for "qo" went down to 4 instead of 5.
Yes, for example, the languages should start words with a couple of letters, not with many letters. Now with latin I have residual with "qo" substitution of 5 (this means "qo" ciphers up to 5 letters at pos1, too much starting letters in the natural language input). I have tested in old catalan just to play (catalan has less startin letters than latin) and the residual for "qo" went down to 4 instead of 5.

