@matt:

Before you send professional English, ask four questions

Closing line:

“Your English does not need to sound native. It needs to make the reader smarter, faster.”

Checklist:

• Reader: Who decides whether this is useful?
• Belief: What do they already think or expect?
• Problem: What is missing, unstable, risky, or changing?
• Change: What should they understand or do next?

End before Q&A:

“That is the practical definition I want you to keep: professional English is reader-useful English.”