EMERGING MARKETS-Latam currencies weaken on U.S. rate hike uncertainty

By Bruno Federowski SAO PAULO, Sept 28 (Reuters) - Most Latin American currencies weakened on Wednesday on uncertainty over the timing of the next U.S. interest rate increases. Traders have been anxiously awaiting new hints about the Federal Reserve's intentions following contradictory comments by Fed officials and a string of mixed economic figures. In a testimony before Congress, Fed Chair Janet Yellen said on Wednesday job creation has accelerated to unsustainable levels, though s