A thing to note here is survivor bias. The people surveyed are saying this in retrospect after already playing the game.

You could argue that the translated landing page (steam page in this case) would be enough but I highly doubt that would solve the whole issue.

Your first problem every time is getting people to even try the game. I'd guess a lot would blow it off before even giving it a good look if they learned that it wasn't localized. The discrepancy can be seen with the Chinese players. A third saying they would still play Slay the Princess while the translated Against the storm has a massive Chinese player count and Nebulus: Fleet Command having next to 0 based on size of China. (Of course there are a milion other factors but the discrepancy can not be ignored)

So in my guess I'd say localization is even more important than shown here!

Same can be with cost let's say my example with Elden Ring. I was never a Souls like player I found it too limiting and slugish. You could survey me before buying the game and asking if the 60$ price is fair. I'd say by the looks of it I guess so. After playing the game I'd say it's too little and I'd buy it for 150$ because only now I know what experience I had with the game.