Inquiries or Enquiries : Which Spelling Is Correct? - GrammarBook.com
https://www.grammarbook.com/blog/spelling/inquiries-or-enquiries/
WebAn inquiry is a formal request relating to a study or an investigation (e.g., law, science, government). An enquiry, on the other hand, will more often apply to informal questions or requests, such as for a book at a library or directions at a gas (petrol) station.
DA: 18 PA: 28 MOZ Rank: 27