Is it possible to correct it so that if "que" is followed by a word that starts with a vowel that it shows the error? For example: Right now I can write "Je pense que il est ....." But it should be "Je pense qu'il est ..." I'm not sure why this isn't one of the errors that it notices, but it should be added.
Yes, you're right. That should have been detected.There is already a rule for that (id=ELISION), but an exception was a bit too aggressive and caused a false negative with: que il → qu’il. que elle was detected as error for example, but not que il. I've just fixed it. Thanks for reporting it!