Most set top boxes/TV remotes have a button or setting called Second Audio Program or SAP, which can toggle the audio language from English to Spanish, and sometimes (if available) to Video Description (audio accessibility for the blind or with low vision). Press this button on the remote or select this setting from the TV menu to switch audio programs.

If that does not help, and you are watching TV (cable set top box, satellite or direct streaming), report the issue with the broadcast to your TV provider directly.