But, in her renowned Ted talk on the power of vulnerability, Brene Brown reminds that the origin of the word courage comes from the latin, 'cor', meaning heart. When the word entered the english language, she said, its original definition "was to tell the story of who you are with your full heart."
Q: When do we start the word "English" with a lower case letter?
In standard English, we don't.
You will see it in lower case in texts, chatrooms, email addresses and other informal writing where people can't be bothered to capitalise, but this doesn't make it right, and this forum is dedicated to maintaining the highest standards of correct English.