Universal Media Server | Forum

They aren't useless, but that aren't exactly intuitive.

The subtitles and audio language priorities only apply if there are multiple valid choices (*) in the "combined" configuration. Thus, the one you should focus on is the "combined" one: What this setting says is: If available, use French audio without subtitles. If French audio isn't available, use ANY (* - which means that the audio language priority comes into play) audio language with French subtitles. If no French subtitles are available, use ANY audio language with subtitles whose language hasn't been detected.

As such, this configuration will never give you English audio with French subs. If that's your first choice, you should try:

"fre" isn't the problem, the problem is that it expects "pairs" but for some reason only finds one language.

Here is what the code accepts for French: I can't see anything wrong with what you say is the setting, a full (trace) log is needed to figure out what is really going on.