Change the narration: She said, "I can speak French fluently."
Explanation
She said that she could speak French fluently.
"Can" changes to "could" in reported speech.
The rest of the sentence stays the same.
She said that she could speak French fluently.
"Can" changes to "could" in reported speech.
The rest of the sentence stays the same.
Install this app on your device for quick access right from your home screen.