Joel Kallman, the Software Development Senior Manager for Oracle APEX has raised the question: Should Oracle Application Express be translated into other languages?
Oracle Application Express (APEX) currently comes with built-in support for 10 languages. But that doesn’t mean that you can’t use it with other languages, too. You always have the possibility to translate the system generated messages into the language you want to use for your application. I think with the last release (3.0) all of this text strings are now translatable.