How can i play english subtitles in my tv lg 42 inches
If the signal is from a digital source with multiple language options, then press Menu and go to Option (with the up/down arrows). Press the right arrow button and go to Caption Text. Press the right arrow button and use the up/down arrows to select English. Press Exit or Menu to save and either return to TV viewing or the previous menu.
Otherwise, you will be limited turning on the captions with the CC button and viewing the captions available with the video feed.
For some sources (DVD, satellite), you may need to change the caption options on that unit. See the appropriate manual for the device.
I hope this helps.