This is a 2014 Korean comedy/drama/music/family/fantasy film. Its Korean name is "수상한 그녀" - in Hangul RR, "Soosanghan Geunyeo." It's also known as "Suspicious Woman."

From: https://mydramalist.com/8614-miss-granny
"Oh Mal-soon is a 74-year-old widow that realizes she is becoming a burden on her family. As she is roaming the streets, she comes across a photo studio and dresses up for a self-portrait. When she walks out, she mysteriously regains her physical appearance from the age of 20. Making the most out of this one in a lifetime opportunity, she changes her name to Oh Doo-ri and decides to enjoy the best out of her youth."

Wikipedia: https://en.wikipedia.org/wiki/Miss_Granny
IMDB:  https://www.imdb.com/title/tt3516378/

I downloaded the source file (Miss.Granny.2014.BluRay.1080p.DTS.x264-CHD) and extracted the subtitles. Then I...
- "Softened" subtitled profanity (bastard --> jerk, damn --> darn, bitch --> wench etc.)
- Used Subtitle Edit (by Nikolaj Lynge Olsson) to find and fix all flagged issues
- Corrected other commonly-found typos
- Watched the film and made fixes/corrections/rewrites to the subtitles for spelling & grammar
- Re-processed the film using Handbrake to add the subtitles as "soft" (not burned in) subtitles

Format: MKV
Format info: Audio Video Interleave
Total file sizes: 3.71 GB
Total duration: 2 hours, 4 minutes, 54 seconds
Overall bitrate: 2656 Kbps

Video format: MPEG-4
Video Codec: H264 - MPEG-4 AVC (part 10) (avc1)
Video bitrate: 4000 Kbps (2-pass)
Video width: 1920 pixels
Video height: 1038 pixels
Video frame rate: 23.976 fps
Video decoded format: Planar 4:2:0 YUV
Video scan type: Progressive

Audio format: MPEG AAC Audio (mp4a)
Audio language: Korean
Audio bitrate mode: Constant
Audio bitrate: 256 Kbps
Audio channel(s): 2
Audio sampling rate: 48 KHz 

Subtitles:  English as soft captions (feel free to extract and use/post however you like)