The words individually could indeed be French but we'd use the oblique case here, "et toi (aussi), Procter & Gamble?". Also, I'm not sure what the usage would

The words individually could indeed be French but we'd use the oblique case here, "et toi (aussi), Procter & Gamble?". Also, I'm not sure what the usage would be in classical Latin, but using the singular to talk about a company in French seems perfectly appropriate. IIRC it's the Brits who like to use the plural for companies and institutions.