Original language is a starting point
The language on a Bitcine title page describes the production. It does not promise every subtitle or dubbed track. Check the viewing edition's audio and text menus for the actual choices available.
Make text readable
Try the subtitle size from your normal seat. Where supported, choose a suitable outline, contrast or background. A setting that works for dark scenes should also remain visible against brighter ones. On a phone, rotate the screen if that gives the text more comfortable space.
When dialogue and text differ
Subtitles based on original audio can differ from a dubbed script. That is not always a timing fault. Choose captions matching the dubbed track when the service provides them. If timing is consistently early or late, check for a supported delay setting.
When timing keeps changing
A subtitle track made for a different cut may drift in ways a fixed offset cannot repair. Compare another available track or edition instead of constantly readjusting the same one. Browse by original language when you want to explore more productions beyond one familiar soundtrack.