SAN FRANCISCO — Consumer groups got their wish Wednesday when the California Supreme Court agreed unanimously to decide whether individuals misled by ads touting products as American-made have standing to sue under the state’s false advertising and unfair competition laws.

But they hope the court uses the case to provide greater guidance on UCL standing in general, what with a hodgepodge of appellate court rulings interpreting Proposition 64 — which cut back on private attorney general suits — in various ways.