The issue stems from a setting on your television. Here are a few tips to change your television setting to your preferred language. On your remote, find the button labeled "SAP," "MST," or "AUDIO." Once located, press the button until you find the language you want to hear when watching the game.
TV stations are required to offer a secondary language option for viewers in addition to the primary audio offering of English. Something is happening within your TV remote/TV set at home that has, for some unknown reason, switched your audio to the Spanish (secondary option) option.