It's almost never in the app's main settings screen. Start the title, then press the Options, menu, or select button on your Firestick remote while it plays. This brings up a row of on-screen controls, and the subtitle toggle usually sits there as a CC or gear icon alongside play, pause, and audio track options. Selecting it opens a short list of languages if the title has any embedded, or shows nothing if it doesn't. Looking in the wrong place, the general app settings instead of the in-player menu, is the most common reason people think the option is missing.

Both apps put the subtitle control in the same general place: the on-screen playback menu you reach with your remote's Options button, not a separate settings screen. In TiviMate, it's typically grouped together with audio track selection, since both menus read from the same embedded file data at the same time. In IPTV Smarters, the icon looks similar and behaves the same way once you find it. The two apps differ slightly in layout and icon style, but the underlying logic is identical: read whatever track data the file actually has, present it as a language list, and apply your choice only for that viewing session.

If the CC icon isn't there at all, or opens to an empty list with nothing to select, the title or channel you're watching doesn't carry a subtitle track in the first place. No remote button sequence or app setting creates one out of nothing, no matter how many menus you check. Live channels are the most common place this happens, since most live feeds don't include caption data the way stored video files do by default. Trying the same content on-demand instead, if it's also available that way in the library, is a reasonable next check before assuming your Firestick setup itself is at fault.

No, they're separate menus even though they often sit right next to each other in the same on-screen controls during playback. Selecting a subtitle language doesn't switch which audio track plays at the same time, and switching the audio language doesn't turn subtitles on or off either, since the two systems read different pieces of the file's track data. If a title offers both types of tracks, you can mix them freely, for example pairing an original-language audio track with a translated subtitle track, without one setting affecting the other at all. Treat them as two independent choices rather than one combined toggle, since some player apps remember each one separately across sessions.