If you don't like how a word/phrase is pronounced, you can substitute it with an audio file of your choice.
To do this, go to the card => "..." icon on the right to open the card menu => Edit.
In the Edit card menu, scroll to see the audio available.
To change the audio, delete the current audio link and paste your own audio link into the text field. Then, click the speaker icon to listen to the new audio before clicking "Save".