The best trick I have after asking it nicely in all sort of ways is:

1. Have it build a scoring script that penalizes words outside a simple English list and approved jargon. Penalize sentences over 15 words as well. Add whatever else.

2. Run it in a loop to reduce the score while preserving intention

This works much better than other ways I’ve tried. Of course it costs more. And I would apply it only to the output to the user, not the thinking process (I think the AI thinks better with their crazy English)

Of course, sometimes nuance is lost by this process. That’s just the nature of making things simpler.