Plasma tv with suspected SAP turned on

I have an LG 42pc5d plasma television, and when certain movies are being played, I will get spanish along the bottom of the screen, but only when a character enters a new room/building. An example is I was watching Night at the Museum last night, and when any of the characters entered a new room in the museum, the name of the room would appear at the bottom of the screen, in spanish. To further illustrate, when Ben Stiller is running from the Huns the first night, and enters the elevator, I believe the word "Invertabros" appears at the bottom of the screen. Also, it is not on the DVD, since my wife brought it back to the store and they tried it out, without any problem. All caption and subtitle options are turned off before the movie is started. This problem does not occur for every movie, just one's that I believe have SAP support. Also, the SAP button on the remote does not bring up any menu on the tv, even though the tv receives the signal (power light blinks when an instruction is sent). Any help would be greatly appreciated. Thanks.