If you prefer official sources over downloading subtitle files:
Reddington (James Spader) questions the whereabouts of a former associate, while the FBI Task Force hunts down Laszlo Jankowics, a criminal dealing in illegal psychedelics. If you prefer official sources over downloading subtitle
Check your local Netflix Bulgaria library; Season 9 is generally available with multiple subtitle options. If you prefer official sources over downloading subtitle
Another primary source for Bulgarian subtitles where fans upload translations for US series shortly after they air. If you prefer official sources over downloading subtitle