I run an SMF forum, and am getting this error constantly and the spell checker is not working.

PHP Code:
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http
://warriorcatsrpg.com/index.php?action=search2
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2
pspell_new() [<a href='function.pspell-new'>function.pspell-new</a>]: PSPELL couldnt open the dictionaryreasonNo word lists can be found for the language "en".
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File
: /home/warrior/public_html/Sources/Search.php
Line
804 
I have been told to install an upgraded version but do not know which one would be best.