The collaboration between RAE and the other academies was expressed in the coauthorship, since the 22nd edition published in 2001, of the Dictionary of the Spanish Language (Spanish: Diccionario de la Lengua Española), and the 1999 edition of the Orthography (Spanish: Ortografía) was considered a true pan-Hispanic work. Joint projects include the editing of the Grammar (Spanish: Gramática) and the compilation of the Dictionary of Americanisms (Spanish: Diccionario de americanismos).[citation needed]