The Prachalit (meaning popular) script is used primarily for writing the Newari language of Nepal (also called Nepal-Bhasha, literally 'Nepal-Language', but not to be confused with Nepali). This script has also been used, extensively in some cases, for writing the Sanskrit, Nepali, Hindi, Bengali, and Maithili languages. The script is one of six subsumed under the name Nepal-Lipi, literally 'Nepal-Script', though it is not to be confused with Devanagari, which is the script normally used for writing Nepali.
Prachalit was previously used along with the Ranjana, Bhujimol, Kutila, Golmol, and Litumol scripts for writing Newari, a Tibeto-Burman language unrelated to Nepali. Use of these scripts began to decline after the Gorkhali conquest of the Kathmandu valley in 1769, and they are now rarely used. Of the six, Prachalit and Ranjana are the most well-known, although even these are not commonly used and most young Newari speakers cannot read them.
The Prachalit script is derived from Brahmi and is an abugida written from left to right. There are two main varieties of Prachalit writing; flat-headed and curve-headed. It is closely related to Devanagari, and many of the letter shapes are similar to their Devanagari equivalents. The script employs a set of digits from 0-9, many of which also look similar to the Devanagari numbers.
There are thirty-six consonants, each representing a consonant+vowel syllable. The default vowel is [a/ə] but this can be changed by attaching one of ten vowel diacritics to the letter. Initial vowels, that is, those which are not preceded by a consonant to which they can attach, are written using independent vowel letters. Two diacritics representing nasalization of a vowel can also be attached to independent vowel letters, to consonant letters (in which case the inherent vowel is nasalized), or to consonant+vowel diacritic combinations. These diacritics are called anusvara and candrabindu. There is also a diacritic called visarga which represents a voiceless [h] after a vowel. These diacritics look similar but not identical to the symbols of the same names used by a number of other Brahmic scripts.
This script is not currently recognized by ISO 15924, but is included in ScriptSource for research purposes. If you have any information on this script, please add the information to the site. Your contributions can be a great help in refining and expanding the ISO 15924 standard.