On PC (Uplay):
When you press the Install button (regardless of whether you install from disc or via download) you will be asked to choose a language. By default, English will be selected. You can choose a different language or select multiple. This will trigger an additional download for the audio packs of the languages you select here before you start the game for the first time. Once the download is finished, you will be able to start the game.
The game will start in the language you selected as main language. If you downloaded another language pack, you can change the audio language later in the Options > Audio Language menu of the game.
If you would like to download additional languages later, you can do so via the game properties in Uplay PC. This will trigger an additional download before you can re-launch the game.
On PC (Steam):
If you play on Steam, you can download the language packs via the Steam client. Simply right-click on Assassin's Creed: Origins in your games library and select navigate to Properties > Language. Select your desired language from the dropdown menu and the client will download the necessary files for you.
以上是原文
On PC (Uplay):
当你按下安装按钮(不管你是安装光盘还是下载)，你将被要求选择一种语言。默认情况下，将选择英语。您可以选择不同的语言或选择多个。这将触发您在第一次开始游戏之前在这里选择的语言的音频包的额外下载。一旦下载完成，你就可以开始游戏了。
游戏将以你作为主要语言的语言开始。如果你下载了另一个语言包，你可以在游戏的>音频语言菜单中改变音频语言。
如果您想以后下载其他语言，您可以通过Uplay PC中的游戏属性来实现。这将在您重新启动游戏之前触发额外的下载。
steam游戏属性改下语言就会自动下载了，然后游戏中设置其他语音。