Why is there no Chinese in opera system?

the p>opera system is in Chinese, so it needs to be configured in Chinese in the settings. The way to configure Chinese in opera system is to open the menu setting-preferences of Opera browser and click the general tab. You will find that the following language options are already in Chinese, but the software interface is still in English. Set the language to English[en] first, and then click Ok. At this time, you will return to the main interface of the software and find that it is still in English. Because what I just set is English. At this time, click the menu setting-preferences, set the language to Chinese in the general tab, then click Ok to save and exit, and then open Opera, and you will find that it is already a Chinese interface.