You may have accidenetly turned on SAP in Spanish. When we had our legacy boxes if you hit the D button it would turn it to Spanish. Sometimes hitting D again would revert back to English. To change it go into your language settings and turn off SAP and make sure the program language is either English or as transmitted. It has been a while, so I am trying to work from memory. We are running X1 now.
I had this issue as well and was very frustrated. I tried resetting the SAP through the settings, but nothing worked. Finally found the answer:
While watching the channel that is in Spanish, press the down arrow on the remote. In the lower left corner there will be a series of symbols, including the SAP symbol. Using your arrow keys, move to highlight this icon and hit select.
You will see Spanish and English with a check mark next to Spanish. Simply highlight English and hit select again.
This solution should be easier to find!