Is there a word for a "letter or letter-like character" in a writing system? With that I mean a grapheme that is not a number, punctuation, special symbol or space, but a letter (alphabet), consonant-vowel-unit (abugida), syllabogram (syllabrary) or a logogram (logographic writing system). Or in other words: A unit of text that is formed by a character of the Unicode category "L", maybe followed by combining marks "M".
I need the word for a user interface; it should be understood by the average user.
To clarify the purpose: I have a system that learns word structures from user input. In the documentation I explain an algorithm that does some stuff with the input. This is the sentence:
By default all letters and letter-like characters (such as the syllable symbols of a syllabary like Japanese Katakana) are included, everything else (such as numbers and punctuation) is excluded [from the alphabet].