The book has a Klingon–English, and an English–Klingon side. The wordlists are automatically generated from a flat text database, which is human readable and easy to update. The database has been continuously updated and improved since it was created in late 1997.

Search Expressions
"…"	search for a phrase (containing more than one word)
*	matches any alphabetical character
tlh:…	search Klingon words (case sensetive)
en:…	search English translations
sv:…	search Swedish translations
pos:…	search part-of-speech field (use abbrev from Introduction, ns#, vs# or free text)
def:…	search defining sources
ref:…	search referring sources

Case only matters when you’re using the search prefix tlh:, otherwise all searches are case insensetive.