As Internet use expands worldwide, the United States said Wednesday it will give other governments and the private sector a greater oversight role in an organization whose decisions affect how computers relay traffic such as e-mail and Twitter posts.

The move comes after European regulators and other critics have said the U.S. government could wield too much influence over a system used by hundreds of millions of people worldwide. Those critics have complained, among other things, about the slow rollout of Internet addresses in languages other than English.