When you want attract the Japanese to a game recently released, your game must be displayed in professional Japanese. Similarly, the Chinese game developers always have a Vietnamese version for the Vietnamese market, and they have been successful.
In a world that is being heavily virtualized, player interaction comes from everywhere. The culmination of the interaction is that a Chinese gamer will interact in Chinese with a Vietnamese gamer who only uses Vietnamese when they play the same game. To make it feasible, developers not only focus on the capabilities of the programmers, but also focus on the diversity of languages for games.