l33t_rul35 specifies rules for translating characters 
into other characters (typically symbols) to mimic 
leet/l33t slang (as a named character vector).
l33t_rul35An object of class character of length 13.
Old (i.e., to be replaced) characters are 
paste(names(l33t_rul35), collapse = "").
New (i.e., replaced) characters are 
paste(l33t_rul35, collapse = "").
See https://en.wikipedia.org/wiki/Leet for details.
transl33t for a corresponding function.
Other text objects and functions: 
Umlaut,
capitalize(),
caseflip(),
cclass,
count_chars_words(),
count_chars(),
count_words(),
map_text_chars(),
map_text_coord(),
map_text_regex(),
metachar,
read_ascii(),
text_to_chars(),
text_to_sentences(),
text_to_words(),
transl33t()