Websites like Subscene, Kaskus, or IndoXXI (though be cautious with the latter as it might not be official and could pose risks) often provide subtitles for various TV shows and movies, including Indonesian subtitles. You would need to download the subtitles specifically for "The Strain Season 4."
The fourth and final season of The Strain consists of 10 episodes and concludes the apocalyptic vampire saga. Set nine months after a nuclear explosion triggered a global "Night Eternal," the story follows the remnants of humanity as they live under the totalitarian rule of the Master and his strigoi minions in an alliance known as "The Partnership". Season 4 Episode Overview the strain season 4 sub indo exclusive