Rumbia fruit is widely available in Indonesia, because Rumbia is a sago tree. So the fruit of rumbia is the fruit produced from the sago tree. This fruit tastes sweet-like. Usually marinated first to remove the sepetnya taste. But the sepetnya Rumbia fruit is not comparable to the sepetnya Rukem raw fruit. So if you eat it straight away is not a problem. Actually there are many more fruits inland Borneo. 
