Hey Syaeful,

The language is dependent on Joomla. You can set the default language to Indonesian from the Language manager at the back end of Joomla

I have to change dafault language to indonesia, but easydiscuss still in english language, what should i do? thanks

Hi Syaeful,

Have you download and installed indonesian language from our language download section here, http://stackideas.com/downloads/languages (Green icon is for easydiscuss component) ? If no you can download it and install the language normally through extension manager.