Wh-.... What's this all of the sudden....

Your words.

What?

While people fall in a state of confusion due to injuries, they would find it difficult to talk in a foreign language involuntarily.

So they would talk in their mother language instead. And in your case, that language is French.

But then, you suddenly switched to using English, in an American accent. Schools in France don't normally teach American's English.

Ergo, you must have direct contact with an American and learned it from them.

Then comes the question. Did you used to study abroad in America? Or did you immigrate there?