A diacritic is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek διακριτικός, from διακρίνω. The word diacritic is a noun, though it is sometimes used in an attributive sense, whereas diacritical is only an adjective. Some diacritics, such as the acute ⟨á⟩, grave ⟨à⟩, and circumflex ⟨â⟩, are often called accents. Diacritics may appear above or below a letter or in some other position such as within the letter or between two letters.
Esperanto is the world's most widely spoken constructed international auxiliary language. Created by L. L. Zamenhof in 1887, it is intended to be a universal second language for international communication, or "the international language". Zamenhof first described the language in Dr. Esperanto's International Language, which he published under the pseudonym Doktoro Esperanto. Early adopters of the language liked the name Esperanto and soon used it to describe his language. The word esperanto translates into English as "one who hopes".
Esperanto is written in a Latin-script alphabet of twenty-eight letters, with upper and lower case. This is supplemented by punctuation marks and by various logograms, such as the digits 0–9, currency signs such as $ € ¥ £ ₷, and mathematical symbols. The creator of Esperanto, L. L. Zamenhof, declared a principle of "one letter, one sound", though this is a general rather than strict guideline.
The circumflex is a diacritic in the Latin and Greek scripts that is also used in the written forms of many languages and in various romanization and transcription schemes. It received its English name from Latin: circumflexus "bent around"—a translation of the Greek: περισπωμένη.
The Danish and Norwegian alphabets is the set of symbols, forming a variant of the Latin alphabet, used for writing the Danish and Norwegian languages. It has consisted of the following 29 letters since 1917 (Norwegian) and 1948 (Danish):
A caron is a diacritic mark commonly placed over certain letters in the orthography of some languages to indicate a change of the related letter's pronunciation.
Ĉ or ĉ is a consonant in Esperanto orthography, representing the sound.
Ĥ or ĥ is a letter of some extended Latin alphabets, most prominently a consonant in Esperanto orthography, where it represents a voiceless velar fricative or voiceless uvular fricative. Its name in Esperanto is ĥo, or ĥi in the Kalocsay abecedary.
Ŝ or ŝ is a consonant in Esperanto orthography, representing the sound.
Proto-Esperanto is the modern term for any of the stages in the evolution of L. L. Zamenhof's language project, prior to the publication of Unua Libro in 1887.
Esperanto is a constructed international auxiliary language designed to have a simple phonology. The creator of Esperanto, L. L. Zamenhof, described Esperanto pronunciation by comparing the sounds of Esperanto with the sounds of several major European languages.
An Esperantido is a constructed language derived from Esperanto. Esperantido originally referred to the language which is now known as Ido. The word Esperantido contains the affix (-ido), which means a "child, young or offspring". Hence, Esperantido literally means an 'offspring or descendant of Esperanto'.
Esperanto and Interlingua are two planned languages with different approaches to the problem of providing an International auxiliary language (IAL). Esperanto has many more speakers; the number of speakers is c. 100,000-2,000,000. On the other hand, the number of speakers is c. 1,500 for Interlingua, but speakers of the language claim to be able to communicate easily with the c. 1 billion speakers of Romance languages, whereas Esperanto speakers can only communicate among each other.
Esperanto and Ido are constructed international auxiliary languages, with Ido being an Esperantido derived from Esperanto and Reformed Esperanto. The number of speakers is estimated at 100 thousand to 2 million for Esperanto, whereas Ido is much fewer at 100 to 1 thousand.
Esperanto and Novial are two different constructed international auxiliary languages. Their main difference is that while Esperanto is a schematic language, with an unvarying grammar, Novial is a naturalistic language, whose grammar and vocabulary varies to try to retain a "natural" sound. Demographically, Esperanto has thousands of times more speakers than Novial.
Greek orthography has used a variety of diacritics starting in the Hellenistic period. The more complex polytonic orthography, which includes five diacritics, notates Ancient Greek phonology. The simpler monotonic orthography, introduced in 1982, corresponds to Modern Greek phonology, and requires only two diacritics.
International auxiliary language orthography is often simplified when compared with natural language orthography.
There are a number of methods to input Esperanto letters and text on a computer, e.g. when using a word processor or email. Input methods depend on a computer's operating system. Specifically the characters ĵ, ĝ, ĉ, ĥ, ŭ, ŝ can be problematic.
Caret is the name used familiarly for the character ^ provided on most QWERTY keyboards by typing ⇧ Shift+6. The symbol has a variety of uses in programming and mathematics. The name "caret" arose from its visual similarity to the original proofreader's caret, a mark used in proofreading to indicate where a punctuation mark, word, or phrase should be inserted into a document. The formal ASCII standard (X3.64.1977) calls it a "circumflex".
