Here you can select or edit language:

Click Select language drop-down list, select the language you need and click Save.

To edit language, you need select a language first and click Edit.

There are four tabs here. After clicking , a new window would open where you can modify the value of these language items.

When your configuration completes, click Save button to save your work or Reset to do it again.
Note: Actually, you can skip this section and let the system to detect automatically.