I observe that when using Palemoon x64 v26.00 browser the German and English langage are mixed.
Here are some screenshots:

have a similar issue on my mobile phone using both explorer and Dolphin... might that be an issue with the mobile version of the forum?

@Fernando
Yes, i see again a mix of english/german words.
I use the new French Package offered when install Palemoon v26.0
With previous v25.8.1 I didn't observed the strange forum 'look'.
The Release Notes of Palemoon v26.0 (a major release) should help to understand why the aspect of the forum is now so quite different.

@Fernando,
Thanks for your analysis.
Not only the missing translations marked in red color, but also the "Look and feel" (the aspect, banner, colors, etc..) are totally different under PaleMoon64 if we compare aspect under FireFox64 or Vivaldi64 or Chromium64 browsers.
The other strange thing is the timestamp of the messages which seems generated by the server located somewhere on the planet with its local time....
Yes, Xobor has some investigations to do..

@Fernando
Thanks for the information.
I understand Xobor has a hard work to upgrade its servers to support to the most advanced technology.
It is usual for Web Server business (i.e. i know that some Telecoms Servers have the same kind of problems or restrictions at this day).
I don't think Pale Moon is specific to Mobile systems.
Are you telling if Pale Moon is installed on a mobile you will browse your site correctly ?
Here is the last and new Release Notes of Pale Moon which explain some web compatibility fixed.
PaleMoon Release Note
However I have tested the last Release v26.0.2 and the problem is always observed.
Thanks again for your time.

I have to add that the forum layout is completely broken in Pale Moon. Quotes don't work, the main forum page doesn't even show icons and numerous other things.
I have all the reasons in the world to believe that PM 100% adheres to web standards in the proper ways, so it must be something being done wrong in the forum software.

Can't believe the Xobor experts. First of all: the issue is not caused by the "browser's mobile presentation" (I'd rather not comment the "hobby project" part), but from their outdated forum code. More details on the issue, here.

To fellow users: to magically solve issues with win-raid.com, simply create a user-agent string override for win-raid.com in about:config that does not contain the word "Goanna". One such example string would be: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.9) Gecko/20100101 Firefox/52.9 PaleMoon/27.2.0

Yes, it's three letters that confuse the Forum software, which believes it's a "Goa" mobile instead of the Goanna rendering engine (fork of Gecko)... They obviously use the extremely bad practice of user agent sniffing and these are the results.

Fernando, please let them know that they don't need to support a "hobby project browser", but to update their problematic browser sniffing so users won't have to pretend they use another browser to override problematic website code.

Thanks Fernando. I can't see something different in that thread. Most problems were caused by an >old issue< of the popular Mobile_Detect PHP class that has been solved/updated almost a year ago, and most websites have updated their code by now. Those websites that still use the old version of that mobile-detection tool, will run into the same issue with Pale Moon (or any browser that contains "Goa" in its user agent string).

The main problem with win-raid.com is the mobile layout and subsequent missing elements that come with it. However, everything works fine if the user changes the browser's user agent string (the desktop layout reappears normally) so I think it's a classic example of browser sniffing gone wrong - the browser itself has no problems with win-raid.com, everything works fine.