While Version 1.1 and 1.2 fixed day-one bugs (like the infamous "Lumiose City Save Glitch"), is the mature, final build of the game. Here is the granular breakdown of the changes:
Game Freak designed Kalos based on France—a European hub. By including all seven major languages in a single patch, Nintendo allowed a Japanese player to battle a Korean player without crashing the system. The "World" tag signifies the removal of language barriers in the Global Trade Station (GTS). Pokemon X - Update 1.3 -World- -EnJaFrDeEsItKo-...
, to keep the games running smoothly as the series transitioned to the next set of titles, Omega Ruby Alpha Sapphire While Version 1
The "-EnJaFrDeEsItKo-" tag in the update title denotes its multi-language global support, covering English (En), Japanese (Ja), French (Fr), German (De), Spanish (Es), Italian (It), and Korean (Ko). The "World" tag signifies the removal of language