The most popular and trusted sources for Sinhala subtitles (subz) are: Baiscope.lk

Here are the most reliable platforms to find fan-translated Sinhala subtitles:

Subtitles show boxes or question marks instead of Sinhala text. Solution: Your video player lacks Sinhala fonts. On VLC, go to Tools > Preferences > Subtitles > Default Encoding. Choose “Universal (UTF-8)” or “Sinhala (IBM 273).” On Windows, install the Iskoola Pota font.