Choose the track, not just the title
Two offers for the same film may have different language options. Before starting, inspect the selected service's audio and subtitle menu. An English catalog description is not evidence of an English dub. A film's original language identifies its production, while the edition determines which tracks you can actually choose.
Captions can do more than translate dialogue
Closed captions may identify speakers and include music or sound cues. A subtitle option intended only for occasional foreign-language dialogue will not display throughout the film. If text appears inconsistently, check the selected track before assuming it is broken. The labels can vary between players.
Make text readable from the seat you use
Where customization is supported, adjust size, outline and background on the actual viewing screen. A setting that is comfortable on a phone may be too small across a living room. If timing is wrong, confirm the episode and edition before changing synchronization controls. An extended introduction or different cut can make otherwise familiar captions appear out of step.
Browse original languages to discover films, then choose your preferred viewing tracks at the destination. Those two steps serve different purposes.