The language setting determines the language of dialogs and menus and can also determine the keyboard and clock layout.
To configure your language settings right-click the desktop and choose Settings. Now choose Region & Language.
Here you can choose:
Language. Choose a language from the list and confirm with Done. To make the change take effect, you need to restart the desktop afterwards.
Formats: To change the formats for date, number, currency and related options, choose a country from the list and confirm with Done. To make the change take effect, you need to restart the desktop afterwards.
Input sources (keyboard layout). Change your keyboard layout here or add another one. If you use more than one keyboard layout, you can switch keyboards by clicking the language code in the Activities Bar.
Note: Settings Made Using ibus-setup Do Not Take Effect
On GNOME, settings made using ibus-setup do not take effect. ibus-setup can only be used to configure IceWM. Instead, always use the Settings application:
To change input methods, use Region & Language.
To change the key combination that switches between input methods, use Devices › Keyboard. In there, choose the category Typing and the entry Switch to next input source.