One of my hobbies is "modifying" JAV subtitles.
I select a JAV that has an interesting story line and and get a copy that has no subtitles and a subtitle file from JAV-Subtitles.
I only speak and write American English.
I start viewing the JAV on the left side of my computer screen with the subtitle file on the right side.
I make the obvious changes like "cock" for "meat stick" etc. I correct the pronoun errors and I complete sentences. Common example - I can't do this" for "can't". Based on the action at the time, I add or substitute for the very repeated word "stop". I also put "words" in the mouths of the actors, which is really the fun part.
A recent JAV subtitle modification is JUQ 111. It is one of the better Camping/Tent story lines and features a great actress. Downloaded 53 times, only 1 thank you.
A really good JAV that I modified is RBD-848. 269 downloads, 7 thank you's. The story line is the "wife-swap" and the actresses are great.

Anyway, I wanted to post this information in case there are viewers who were not aware of my modification efforts and/or used the subtitle file for many of the JAVs before I modified that subtitle file and had no reason to go back to a particular JAV subtitle.

Here is a list of JAV subtitles I've modified.

Caribbeancom 110314-727 JUQ-022
MXGS-910 PGD-795 JUL-191
MEYD-402 MEYD-547 MIDE-775
RBD-848 SSNI-674 JUQ-111
MIDE-670 PPPD-501 SNIS-191
SNIS-498 SNIS-498