I'd like to have some proficiency in Danish, Gaelic, Greek, Portuguese, Spanish, Finnish, Swedish, Estonian, Hungarian, Latvian, Lithuanian, Maltese, Polish, Czech, Slovene, Slovak, Bulgarian, Romanian, Croatian, Mandarin, Hindi, Russian, Arabic, Japanese, Korean, Vietnamese, Thai, Malay, Tagalog, Javanese, Sundanese, Balinese, Madurese, Ilocano, Cebuano, Cantonese, Hokkien, and Hakka.
If you learn Malay you can generally talk to people on Bali and Java too. Standard Malay and standard Indonesian are pretty similar from what I hear, with the main difference being that Malay has more English words and Indonesian has more Dutch words because of the colonial history. I've heard the languages are fairly easy to learn, grammar is easy and writing is fairly phonetic. I know a few words: pisang (banana), babi panggang (roast pork, babi means pork I think), orang utan (orang means human or person), nasi goreng (fried rice, nasi means rice).
And for Czech and Slovak, I think that is mostly the same language, officialy seperate languages only for political reasons.
Danish and Swedish are somewhat similar too. I can sometimes understand a little bit of those because I speak Dutch.