Opensubtitles subtitles in Spanish instead of English?

Hi everybody!

I have Serviio set to retrieve subtitles from opensubtitles.org
My preferred language of subtitles is set to: nl,en,eng,english
(NL = Dutch, which is the first preference, and after that comes English).

However, the automatic retrieval gets subtitles in I think spanish?

Detailed log tells me this:
2020-10-22 16:13:51,688 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E02 Starter Home.mkv (pob)
2020-10-22 16:13:51,763 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E01 300.mkv (eng)
2020-10-22 16:13:51,794 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E03 Rule 34.mkv (pob)
2020-10-22 16:13:51,889 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E04 Innocence.mkv (pob)
2020-10-22 16:13:51,904 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E05 The Tall Man.mkv (pob)
2020-10-22 16:13:52,184 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E06 Luke.mkv (dut)
2020-10-22 16:13:52,277 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E07 Twenty Seven.mkv (pob)
2020-10-22 16:13:52,280 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E09 Broken Wing.mkv (pob)
2020-10-22 16:13:52,385 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E08 Ashley.mkv (pob)
2020-10-22 16:13:52,386 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E10 Flesh and Blood.mkv (pob)
2020-10-22 16:13:52,666 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E11 Night Lights.mkv (pob)
2020-10-22 16:13:52,765 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E12 Hamelin.mkv (pob)
2020-10-22 16:13:52,777 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E14 Sick and Evil.mkv (pob)
2020-10-22 16:13:52,863 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E13 Chameleon.mkv (pob)
2020-10-22 16:13:52,889 INFO [OpenSubtitlesClient] Found correct subtitles for file Criminal Minds S14E15 Truth or Dare.mkv (spa)

And indeed: Episode 1 has it in English, episode 6 has it in Dutch, and I guess the rest has it in a language called 'pob'?

Any idea how I can make sure it always fetches subtitles in Dutch or English?

And just to clarify:

Yes, I'm using the latest version (2.1)
Yes, the same problem occurs with other TV shows as well.
Yes, all these episodes also provide English (and sometimes Dutch) subtitles when I search for the episodes on opensubtitles.org , but Serviio seems to load random subtitles with a preference for pob.