transcript.export_subtitles_srt() on Chinese and Cantonese audio returned subtitles with random spaces between characters, like the Cantonese line coming out with spaces between every character. Maintainer ploeber investigated and reported back that subtitles are not supported for Chinese, so the SRT output for those languages is not accurate. The recommendation is to use the plain transcript.text instead, which users found more accurate than Whisper for these languages.