Do not rely on your streaming service's broken AI. Take ten minutes to download the proper SRT files. Your patience will be rewarded with one of the greatest tragedies ever put on cable television. Once you see Gannicus raise his hands in the arena—reading the precise captions of his final oath—you will understand why the effort was worth it.

00:00:48,000 --> 00:00:50,500 He carries the honor of the house upon his sword.

Here is the text for English subtitles for the key opening scene of (the prequel season).

mojetitulky.com (Specific episode listings for 1080p BDRips). Spartacus: Gods of the Arena Review - The Triple Option

If you already own the episodes on DVD/Blu-ray, the disc set includes official English subtitles. For digital copies, check your retailer's playback options (e.g., Vudu, iTunes, Google Play).