indexer recodes all documents to the character set specified in the "LocalCharset" indexer.conf command. Recoding only inside character set group is available. This is currently implemented for "Cyrillic", "Central Europe", "Greek", "Baltic" groups. Hebrew iso-8859-8 and windows-1255 character sets are letters compatible, Turkish iso-8859-9 and windows-1254 character sets are letters compatible, i.e. no recoding is required for Hebrew and Turkish character sets.

Recoding between character sets from different groups, for example, from Cyrillic koi8-r into Western iso-8859-1 will never be done by indexer.