CREATE EXTENSION unaccent; -- must have a UTF8 database SELECT getdatabaseencoding(); SET client_encoding TO 'UTF8'; SELECT unaccent('foobar'); SELECT unaccent('ёлка'); SELECT unaccent('ЁЖИК'); SELECT unaccent('˃˖˗˜'); SELECT unaccent('À'); -- Remove combining diacritical 0x0300 SELECT unaccent('unaccent', 'foobar'); SELECT unaccent('unaccent', 'ёлка'); SELECT unaccent('unaccent', 'ЁЖИК'); SELECT unaccent('unaccent', '˃˖˗˜'); SELECT unaccent('unaccent', 'À'); SELECT ts_lexize('unaccent', 'foobar'); SELECT ts_lexize('unaccent', 'ёлка'); SELECT ts_lexize('unaccent', 'ЁЖИК'); SELECT ts_lexize('unaccent', '˃˖˗˜'); SELECT ts_lexize('unaccent', 'À');