[ context for “Cake” here ]
… “The player-character, Chell, is challenged and taunted by an artificial intelligence named GLaDOS (Genetic Lifeform and Disk Operating System) to complete each puzzle in the Aperture Science Enrichment Center using the portal gun with the promise of receiving cake when all the puzzles are completed.” … https://en.m.wikipedia.org/wiki/Portal_(video_game)

Good article, apart from talking so much about choosing a language for the user and ignoring the Accept-Language header, which exists solely for this reason.

Most websites seem to ignore this header and just show you whatever their geo-ip says.