The first time KEBook2 start, you have to do the configuration of KEBook2 so that you can use a dictionary.
The way of setting is follows:
Choose a directory to cotain the dictionaries you want to use.
Go to
[Options]->[Set a Directory to contain the dictionary...]
and choose the directory which contain the dictionary you want to use.
Choose a dictionary you want to use.
Go to
[Options]->[Select a Dictionary...]
and choose a dictionary you want to use.