On Tuesday, Fed Governor Daniel Tarullo told CNBC television he doesn't expect the economy is prepared for a rate hike this year, while St. Louis Fed President James Bullard said an October rate rise is unlikely.
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Their remarks came after data showed Chinese imports fell 20 percent in the year through September, which underscored falling domestic demand that raises pressure on Beijing to introduce more stimulus.
That knocked the Australian dollar, a proxy for investments to China, off a two-month high to $0.7271. The New Zealand dollar was down 0.6 percent at $0.6675.
Anxiety about the world's second-biggest economy had pushed the dollar to three-week lows against a basket of currencies as expectations faded on a U.S. rate increase later this year.
The dollar index, which tracks the U.S. currency against a basket of six major currencies, hit a three-week low of 94.539 before retracing much of the decline to be fractionally lower at 94.759.
The dollar was down 0.15 percent at 119.820 yen, while the euro rose to $1.14110, a three-week peak, before easing to $1.1381, according to EBS data.
The euro retreated from its earlier peak after the ZEW survey of German economic sentiment fell short of forecasts due to the Volkswagen scandal and weakness in emerging markets.
The euro, however, gained against the British pound after a surprise September fall in UK consumer prices overshadowed the confirmation of a 69 billion pound ($100 billion) merger of beer producers SABMiller and Anheuser-Busch InBev.
Sterling was 0.6 percent weaker against the dollar at $1.5255 and hit an eight-month low against the euro at 74.93 pence.