Is there a word for a person who uses words that they don't understand. Or a name for the usage of words that one does not comprehend? For example, I'm trying to describe a woman leading a training class who could read really well in English - very loud, pronunciation was good - but when someone asked her what "voyeurism" meant, she had no idea and admitted she'd read the word "a thousand times" and will "look it up one day".
The idiom parrot fashion comes pretty close, I think. You could say the woman learned the word "voyeurism" parrot fashion.
parrot fashion: if you learn something parrot fashion, you repeat what someone has just said without understanding it
parrot fashion: copying or repeating what someone says without thinking about it or understanding it properly
Another term that could help in your context is mindlessly. The woman was using the term mindlessly, i.e. mechanically, without thinking or understanding what it means.