The correct spelling of the punctuation mark used to indicate a question in written language is "question mark," not "interrogation point." The IPA phonetic transcription for "question mark" is /ˈkwɛs.tʃən mɑːrk/. It is important to use proper spelling and pronunciation in written and spoken language to ensure clear communication. The misuse of terms, such as "interrogation point," can lead to confusion and misunderstandings.