Cinemagraph Pro for macOS, Cinemagraph Pro for iOS, and Persecond for macOS are available in the following languages: English, French, German, Italian, Japanese, Portuguese, Simplified Chinese, Spanish and Traditional Chinese.
The language of the apps will reflect your macOS and iOS language preferences. The apps will be displayed in whichever available language is highest in your preferred languages list.
Go to System Preferences on your Mac and click Language & Region to manage your preferred languages.
On iOS, go to Settings > General > Language & Region to manage your preferred languages.