2.0 2025-04-30 es 11.0.0 The Unicode Standard, Version 1.1 Internetstiftelsen i Sverige (IIS), “IDN Reference table for Spanish language” https://github.com/dotse/IDN-ref-tables/blob/master/language-tables/spanish-lang-ref-table.txt accessed on 2016-10-16 RFC 5982, Faltstrom, P., Ed., “The Unicode Code Points and Internationalized Domain Names for Applications (IDNA)”, https://tools.ietf.org/html/rfc5892 RFC 5891, Internationalized Domain Names in Applications (IDNA): Protocol https://tools.ietf.org/html/rfc5891 ISO/IEC 6937 Third Ed. 2001-12-17- Information technology — Coded graphic character set for text communication — Latin alphabet: Table D.1 (p 35) Use of Latin alphabetic characters. Everson, Michael. The Alphabets of Europe: “Spanish” https://www.evertype.com/alphabets/spanish.pdf Everson, Michael. The Alphabets of Europe: “Spanish” https://www.evertype.com/alphabets/spanish.pdf Everson, Michael. The Alphabets of Europe: “Spanish” https://www.evertype.com/alphabets/spanish.pdf The Unicode Consortium, Common Locale Data Repository (CLDR) Version 28 (2015-09-16) - Locale Data Summary for Spanish [es] https://www.unicode.org/cldr/charts/28/summary/es.html The Unicode Consortium, Common Locale Data Repository (CLDR) Version 28 (2015-09-16) - Locale Data Summary for Spanish [es] https://www.unicode.org/cldr/charts/28/summary/es.html Wikipedia: “Latin Alphabets” https://en.wikipedia.org/wiki/Latin_alphabets accessed 2015-10-31 ISO/IEC 646:1991 — Information technology — ISO 7-bit coded character set for information interchange Wikipedia: “Spanish orthography” https://en.wikipedia.org/wiki/Spanish_orthography Dominios “.es”, Syntax regulations, in “Other applicable Regulations" https://www.dominios.es/dominios/en/todo-lo-que-necesitas-saber/normativa/otras-normas-aplicables#Sintaxis Dirección Nacional del Registro de Dominios de Internet, Normativa vigente, https://nic.ar/normativa-vigente.xhtml Wikipedia, Catalan Orthography, https://en.wikipedia.org/wiki/Catalan_orthography, accessed on 28 November 2022 Fundacio PuntCAT registry (.CAT), IDN table for CAT_ca Version 1.0, 12 February 2006, https://www.iana.org/domains/idn-tables/tables/cat_ca_1.0.html Fundacio PuntCAT registry (.CAT), Rules of the .cat domain, https://domini.cat/en/rules-of-the-cat-domain/