java 插件使用操作系统区域设置而不是浏览器区域设置.

The java plugin uses the OS locale not the browser one.

要覆盖默认区域设置，请进入 java 控制面板 - java 选项卡，按 Applet 运行时设置的查看按钮，并在第 4 列中添加所需的参数，即使它变灰也是可编辑的.

To override the default locale, go in the java control panel - java tab, Press the View button of the Applet Runtime Settings, and add the required parameter in the 4th column, it is editable even if it's grayed.

在你的情况下，试试 -Duser.language=es

In your case, try something like -Duser.language=es

再见.