SkySafari 7 currently supports English, Spanish, Portuguese, Japanese, Korean, Russian, Italian, French and German.
On iOS/iPadOS you can set your preferred language for any app using the iOS Settings.
https://www.idownloadblog.com/2021/06/07/how-to-change-the-language-of-an-app-on-iphone-or-ipad/
Or, switch your device OS to your preferred language, and if supported, SS7 will reflect your choice.