data_int_syllablesdata_char_stopwords
data_char_wordlists
integer of length 133245.data_int_syllables provides an English-language syllables dictionary; it is
an integer vector whose element names correspond to English words. Built from
the freely available CMU pronunciation dictionary at 
http://www.speech.cs.cmu.edu/cgi-bin/cmudict.data_char_stopwords provides stopword lists in multiple
languages; it is a named list of characters with the lowercase language name
(in English) as the name of each list element.
Supported languages are Arabic, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Norwegian, Portuguese, Russian, Spanish, and Swedish.
data_char_wordlists provides word lists used in some readability indexes; 
it is a named list of character vectors where each list element 
corresponds to a different readability index.
These are:
DaleChallSpacheKlare, G. R. 1975. "Assessing readability." Reading Research Quarterly 10(1): 62-102.
Spache, G. 1953. "A new readability formula for primary-grade reading materials." The Elementary School Journal 53: 410-413.