Alternate Spelling
Languages such as German, Danish, and Swedish contain words that have more than one accepted spelling. For example, in German, you can substitute ae for รค. The ae character pair is known as the alternate form.
By default, Oracle Text indexes words in their alternate forms for these languages. Query terms are also converted to their alternate forms. The result is that you can query these words with either spelling.
Enable and disable alternate spelling for your language with the alternate_spelling attribute in the BASIC_LEXER preference type.
See Also: Oracle Text Reference to learn more about the BASIC_LEXER