Many people are just now realizing what the “WC” on restroom signs actually means. In the US, public restrooms have many names—lavatory, restroom, or throne—but “WC” remains a common and often misunderstood label. A recent discovery on social media has people baffled. “I’m glad someone asked because I’ve been wondering this for years,” one person wrote, while another admitted, “I can’t believe I’ve been living with a WC sign and had no idea why it was called WC.”…