: Official Region A Blu-ray releases (such as the Hong Kong version from Bad Panda Shop or YesAsia) include English and Chinese subtitles.
You can find .srt files for this specific BluRay rip on these major repositories: subtitle Thermae.Romae.2012.BluRay.720p.DTS.x26...
If you prefer an official stream or physical copy that includes English subtitles: : Official Region A Blu-ray releases (such as