A diacritical mark is a symbol added to a letter or character to indicate a change in pronunciation or meaning. The Hacek (also known as a caron) is a diacritical mark with a V-shaped symbol placed over a letter, usually used in Czech and Slovak languages. The Tilde is a diacritical mark with a wavy line placed over a letter, usually used in Spanish and Portuguese languages. The Umlaut is a diacritical mark with two dots placed over a letter, usually used in German and Swedish languages. The BREVE is a diacritical mark with a curved symbol placed over a letter, usually used in Romanian and Turkish languages. The ACUTE is a diacritical mark with a V-shaped symbol placed over a letter, usually used in French and Greek languages. The Macron is a diacritical mark with a straight line placed over a letter, usually used in Latin and Welsh languages. The Macrons is a plural form of the Macron. The Tildes is a plural form of the Tilde. The TITTLE is a diacritical mark with a dot placed over a letter, usually used in Hebrew and Arabic languages. The Cedilla is a diacritical mark with a comma-shaped symbol placed under a letter, usually used in French and Turkish languages.