Are my texts sent to DeepL every time I use the Ctrl+C / ⌘C keyboard shortcut?
No, when you copy a text (with Ctrl+C or ⌘C), nothing will be sent to DeepL. Only when you press Ctrl+C/ ⌘C the second time will your text be sent to DeepL for translation. If you have a DeepL Pro subscription, your texts and translations will not be stored.