Upside-down question and exclamation marks

This article needs attention from an expert in linguistics. The specific problem is: far too much information is missing or lacks good sources; requesting attention from knowledgeable Wikipedians. WikiProject Linguistics may be able to help recruit an expert. (April 2020)

The upside-down (also inverted, turned or rotated) question mark ¿ and exclamation mark ¡ are punctuation marks used to begin interrogative and exclamatory sentences or clauses in Spanish and some languages that have cultural ties with Spain, such as Asturian and Waray.^[1] The initial marks are mirrored at the end of the sentence or clause by the ordinary question mark, ?, or exclamation mark, !.

Upside-down marks are supported by various standards, including ISO-8859-1, Unicode, and HTML. They can be entered directly on keyboards designed for Spanish-speaking countries.