In Season 2, Jaqen H’ghar says "Valar Morghulis" (All men must die). A popular unverified subtitle file translated this as "Goodbye, friend." While contextually adjacent, it completely erases the prophecy and Arya’s future arc. Verified subtitles keep the High Valyrian phrase and provide the English translation.
A verified subtitle file for a 60-minute episode of Game of Thrones (including all non-English parts) should be 45–70 KB. A 15 KB file has deleted the foreign language lines. game of thrones subtitles for non english parts verified
Without verified subtitles for non-English parts, you are watching a silent movie where everyone suddenly speaks gibberish. With them, you are a true linguist of Westeros and Essos. In Season 2, Jaqen H’ghar says "Valar Morghulis"