Any relatively minor variation of the 26-letter Latin alphabet.
The Roman alphabet adopted from the Greek by way of the Etruscan alphabet, consisting of 23 letters and forming the basis of numerous alphabets around the world, including those of modern western Europe.
Thus, to take an example, he will not print a critical text of Plautus with two letters (Y and Z) which were no part of the Latin alphabet in the age of that comedian; still less will he introduce into Latin texts distinctions, such as i,j and u, v, which were not used till long after the middle ages.
Soon after the dialect had reached its latest form, the Latin alphabet was adopted.
But conversion, after all, was the chief aim of these devoted missionaries, and when some Venetian priests had invented a Latin alphabet for the Magyar language a great step had been taken towards its accomplishment.