The reason why the english version and only the english version uses the 1-2-3 ECT affixes for the spells is because of history. The original translations of Final Fantasy in the west used numeric values for spells, all the way up to I believe final fantasy 8s release? Re-Releases of the older games since use the a. aga, aja now, but for the localisation of 14 they decided to use the numbers as that is what they thought westerners would be more familiar with it