If you want use spellchecker in chats then:

1) Download aspell resources and dictionaries from:
   https://sourceforge.net/projects/eiskaltdcpp/files/Other/aspell.zip

2) Unpack archive "aspell.zip" and put "aspell" directory into "Resources"
   subdirectory near "translations", "sounds" and other data files.

   For example "aspell" directory may be here:
	/Applications/EiskaltDC++.app/Contents/Resources/aspell/

3) For disabling and enabling of spellchecker just send special command in any
   public or private chat:
	/aspell off
	/aspell on

   To see more chat commands send:
	/help

