when do you use an inverted question mark
Inverted question and exclamation marks Inverted question marks (¿) and exclamation marks (Commonwealth English) or exclamation points (American English) (¡) are punctuation marks used to begin interrogative and exclamatory sentences (or clauses), respectively, in written Spanish and sometimes also in languages which have cultural ties with Spanish, such as in older standards of Galician (now it is optional and not recommended) and the Waray language.[1] They can also be combined in several ways to express the combination of a question and surprise or disbelief. The initial marks are normally mirrored at the end of the sentence or clause by the common marks (?, !) used in most other languages. Unlike the ending marks, which are printed along the baseline of a sentence, the inverted marks (¿ and ¡) descend below the line.
Diaeresis (diacritic) The diaeresis (UK: /daɪˈɪrɪsɪs/[citation needed], US: /daɪˈɛrɪsɪs/ dy-ERR-i-sis; plural: diaereses), also spelled diæresis or dieresis and also known as the tréma (also: trema) or the umlaut, is a diacritical mark that consists of two dots ( ¨ ) placed over a letter, usually a vowel. When that letter is an i or a j, the diacritic replaces the tittle: ï.[1]