Your database uses specific NLS (National Language Support) character sets like WE8MSWIN1252 or JA16SJIS .
For manual downloads, the most reliable source is the Oracle Central download page. Visit the Oracle JDBC Drivers download page . download orai18n.jar
Complete Guide to Downloading and Implementing orai18n.jar If you are working with Oracle databases and Java applications, you have likely encountered character encoding issues or globalization requirements. The file is the essential library provided by Oracle to handle internationalization (I18N) and character set conversions. Your database uses specific NLS (National Language Support)