I swear I am not a Google plant. I JUST went through the same process the OP did (literally yesterday).
The Play reviewer took down the app because they thought they needed sign-in information to test it (like the OP). However, this was based on a misunderstanding of some menu item in the app - the app, in fact, is perfectly usable without signing in.
I replied to the original email I had received about the problem, and... A few days later, a real human replied that they agreed with my take, and had removed the objection. However, they had found other policy violations, regarding the maturity rating viz-a-viz the app contents (it's a game). They included screen shots, showing that they had not only played the game, but pretty thoroughly, too.
Again, I followed the recommendations to comply (went over the rating wizard) and requested a re-evaluation. This was done a day later and the app re-instated. Done.
I was super surprised about how well the process worked. I even went through the trouble of completing their little support survey with praise. I had been bracing myself for a Kafkaesque nightmare when the app was taken down, considering just how many app updates Google reviewers must be going through on a daily basis, and I'm pretty sure each violation is met with some sort of discussion from the developer's side. Not to mention the reputation Google has earned for support. It goes to show that people have different experiences, and not all of them are negative.
EDIT: Just wanted to add that I don't think the OP's story is particularly egregious either. So Google auto-translates your app title? I guess you opted into this somewhere, at least they don't do this for my app. And I would never assume that Google would sit and hand-translate app titles to every language. And in either case, it actually looks like OP got timely and fairly accurate advice. I must sound like some starry-eyed Google fanboy, but I'm really not, just not seeing it here.