Hi. The $phpdig_words_chars['iso-8859-2'] = '[:alnum:]ðþß'; is for non-accented 'lowercase' letters such as the German ß (pronouced 'ess set' if I remeber correctly) for example. Sort of think of it like anything that doesn't go in $phpdig_string_subst['iso-8859-2'] might go in $phpdig_words_chars['iso-8859-2']. If you will, once you get your 'iso-8859-7' set, please post it in the Mod Submissions forum in case others might want to use it. Thanks. 
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