Skip the instructions part (yes, it's me again, pointing that the instructions/data part of this is a silly red herring people get hung up on).

It's enough you start using shibboleth terms in key areas. Do not remark on them, just use them. There are good chances the LLM will naturally pick up and start using them too, while that document sits in context.

If anything, embedding an explicit instruction to repeat shibboleths would backfire, because AI systems nowadays run classifiers against prompt injection attacks.