It might be time to brush up on your Swahili.Tanzania looks to be one of the world’s biggest economic success stories over the next five years. While its dynamic neighbor to the north grabs most of the headlines, the unassuming East African nation has strung together 12 consecutive years of +6% GDP growth. And there’s no end in sight. The discovery of huge offshore natural gas deposits and steadily improving governance suggest Tanzania’s growth story will continue well into the next decade. The IMF predicts the economy will expand 7.2% in 2014.