Question: The Tetum alphabet, based on the Latin alphabet, also known as the Roman alphabet, has how many letters?

Context paragraphs:
Latin spelling and pronunciation: Latin spelling, or Latin orthography, is the spelling of Latin words written in the scripts of all historical phases of Latin from Old Latin to the present.  All scripts use the same alphabet, but conventional spellings may vary from phase to phase.  The Roman alphabet, or Latin alphabet, was adapted from the Old Italic script to represent the phonemes of the Latin language.  The Old Italic script had in turn been borrowed from the Greek alphabet, itself adapted from the Phoenician alphabet.

Latin-script alphabet: A Latin-script alphabet (Latin alphabet or Roman alphabet) is an alphabet that uses letters of the Latin script.

Tetum alphabet: The Tetum alphabet is used to write Tetum.  It is based on the Latin alphabet and contains 28 letters:

Yakut scripts: There have been three major Yakut writing systems in use since the early 20th century.  The first systematic alphabet was developed by Semyon Novgorodov, and was based on the International Phonetic Alphabet.  Novgorodov's alphabet was developed in 1917, and continued in use until 1929.  In addition to the characters shown below, Novogorodov also introduced four letters to represent the diphthongs found in Yakut: /ɯa͡/ – ꭠ, /ie͡/ – ꭡ, /uo͡/ – ꭣ, and /yø͡/ – w. Vowel and consonant length was indicated with the colon (e.g. a:, t:).  While this alphabet was in use, various changes were implemented, including the addition of capital letters.  After 1929, Novgorodov's alphabet was replaced by a form of Latin script based on the Uniform Turkic Alphabet.  This was in turn replaced in 1939 by an alphabet using the Cyrillic script.  Prior to the Novgorodov alphabet, various "ad hoc" phonetic Latin and Cyrillic-based systems had been developed.

Latin alphabet: The classical Latin alphabet, also known as the Roman alphabet, is a writing system originally used by the ancient Romans to write the Latin language.  The Latin alphabet evolved from the visually similar Cumaean Greek version of the Greek alphabet, which was itself descended from the Phoenician abjad, which in turn was derived from Egyptian hieroglyphics.  The Etruscans who ruled early Rome adopted the Cumaean Greek alphabet which was modified over time to become the Etruscan alphabet, which was in turn adopted and further modified by the Romans to produce the Latin alphabet.

Fraktur: Fraktur (] ) is a calligraphic hand of the Latin alphabet and any of several blackletter typefaces derived from this hand.  The blackletter lines are broken up; that is, their forms contain many angles when compared to the smooth curves of the Antiqua (common) typefaces modeled after antique Roman square capitals and Carolingian minuscule.  From this, Fraktur is sometimes contrasted with the "Latin alphabet" in northern European texts, which is sometimes called the "German alphabet", simply being a typeface of the Latin alphabet.  Similarly, the term "Fraktur" or "Gothic" is sometimes applied to "all" of the blackletter typefaces (known in German as "Gebrochene Schrift ", "Broken Script").

Shavian alphabet: The Shavian alphabet (also known as the Shaw alphabet) is an alphabet conceived as a way to provide simple, phonetic orthography for the English language to replace the difficulties of conventional spelling.  It was posthumously funded by and named after Irish playwright George Bernard Shaw.  Shaw set three main criteria for the new alphabet: it should be (1) at least 40 letters; (2) as "phonetic" as possible (that is, letters should have a to phonemes); and (3) distinct from the Latin alphabet to avoid the impression that the new spellings were simply "misspellings".

Benjamin Franklin's phonetic alphabet: Benjamin Franklin's phonetic alphabet was Benjamin Franklin's proposal for a spelling reform of the English language.  The alphabet was based on the Latin alphabet used in English.  Franklin modified the standard English alphabet by omitting the letters c, j, q, w, x, and y, and adding new letters to explicitly represent the open-mid back rounded and unrounded vowels, and the consonants sh, ng, voiced th, and voiceless th.  It was one of the earlier proposed spelling reforms to the English language.  The alphabet consisted of 26 letters in the following order:

Filipino alphabet: The Modern Filipino alphabet (Filipino: "Makabagong alpabetong Filipino" ), otherwise known as the Filipino alphabet (Filipino: "alpabetong Filipino" ), is the alphabet of the Filipino language, the official national language and one of the two official languages of the Philippines.  The Modern Filipino alphabet is made up of 28 letters, which includes the entire 26-letter set of the ISO basic Latin alphabet, the Spanish "Ñ" and the "Ng" digraph of Tagalog.  It replaced the Pilipino alphabet of the Fourth Republic.  Today, the Modern Filipino alphabet may also be used as the alphabet for all autochthonous languages of the Philippines and in writing Chavacano, a Spanish-derived creole.

Somali Latin alphabet: The Somali Latin alphabet is an official writing script in the Federal Republic of Somalia and its constituent Federal Member States.  It was developed by the Somali linguist Shire Jama Ahmed specifically for transcribing the Somali language, and is based on the Latin script.  The Somali Latin alphabet uses all letters of the English Latin alphabet except "p", "v" and "z".  There are no diacritics or other special characters, although it includes three consonant digraphs: DH, KH and SH.  Tone is not marked and a word-initial glottal stop is also not shown.  Capital letters are used for names and at the beginning of a sentence.

Supporting paragraphs: Tetum alphabet Latin alphabet
Answer: 28