Keynote
Choose a language for Keynote for iCloud
You can change the language shown in Keynote for iCloud windows, menus, and buttons, to any of the following languages: Arabic, English, French, German, Hebrew, Japanese, Simplified Chinese, Spanish, Brazilian Portuguese, Norwegian, Swedish, Finnish, Danish, Dutch, Traditional Chinese, Italian, Polish, Portuguese, or Korean.
Go to iCloud Settings, click the current language, then click the pop-up menu and choose one of the languages listed above.
Note: Depending on the language chosen, this setting affects all iCloud apps. If you choose a language that’s written right-to-left, such as Arabic or Hebrew, only Keynote, Pages, and Numbers are shown in that language; other iCloud apps use the previously selected language.