@komitsuki
1. about javanese
javanese is one of dialect groups in Indonesia, just like Chinese have Hokkien, Teochew, Cantonese, etc. Indonesia has a vast variety of cultures, you know.. I would say it could be more than a hundred different tribes and clans.
2. about Malay language of Indonesian standard
it's true that Bahasa Indonesia (Indonesian language) is a different variant of malay language. BUT i think Bahasa Indonesia is a 'purer' form of malay language. the malay language spoken nowadays in singapore and even in malaysia is greatly influenced by english. there are so many vocabularies derived from english compared to Bahasa Indonesia. In addition, i think Bahasa Indonesia is a more polite language.
oh,, i'm an indonesian studying in singapore and i take malay language as my second language in school, so i know the two languages quite well ^^
ps : i prefer to use "Bahasa Indonesia" than "Indonesian Language"
because it's the official name of our national language and it's internationally accepted that way, i suppose