I was not thinking about (nor do I know) the specific wording used in a plea bargain.
If your concern is the wording, where do we draw the line? We often use wording which doesn’t reflect reality. A rhetorically sarcastic comment, a story, a joke, a quote, etc., sometimes do not reflect reality in their words, but in context, are often used in a completely non deceitful way. How many people click “I have read and accept the Terms and Conditions” for a program installation or online credit card application without actually having read it?
There are things mentioned here and in other discussions which I have specifically discussed with my posek, who said they are fine. I don’t think the implication that someone who doesn’t follow one particular mehalach is not a yashar is correct.