In my own example I wrote:
I changed it to this to avoid getting English subs with English languages, but if there's no language specified (asterix means all) the priority will be to give any subtitles:
The priority is what you put first:
*,* = it's useful when the audio and/or subtitles are undetermined. I had problems making the subtitles show up for some videos. Telling the program to just give me any solved my problem.
jpn,* = for animes that might have unspecified subtitles.
eng,off = I'd put that first if I wanted animes with dual audio to be in English without subtitles by default.
*,off = Any languages, no subtitles.
jpn,eng = that's what I'd use if the anime sounds better in its original Japanese language. It's hard to voice utter cuteness as well as a Japanese girl can.
eng,eng = Sometimes an english movie whispers so much that I like to have the subtitles anyway, it helped me to learn it better. Also useful if the Japanese audio track was called English by mistake.
SRT external subtitle files
The settings that you choose by default might not work to turn off the files, or you need to change the settings to make them appear by default... or the name of the file.
Maybe there's a setting to load them no matter how they are named, but as far as I know: the subtitle file needs to have the exact same name as the movie; but with a different extension (they're probably invisible).
If you have more than one external file, you can add a dot and a name; but after writing the same name as the movie (and before the invisible file type ".srt")
Example of a movie with two subtitle files, English and Japanese:
If I want only the foreign dialogs for a movie by default I call them "eng", but it can be useful to also have subtitles for "all".
If "eng" isn't selected first, try "en" and "eng-all" or something to trick the alphabetical order. It can happen if only the green arrow appears, because the priority is specified in the white square, and they usually select the subtitles in a ".mkv" file and isn't needed for external subtitles...
I like to have the subtitles on by default for my animes, but I want them off for English movies. Here's my trick to have both:
English movies often have an external file. I rename it by adding ".all" and make a copy called ".eng", in it I write only one word that lasts one second at the beginning of the movie, to remind me that there are subtitles available. I open the srt file with note-pad and I write only:
00:00:01,000 --> 00:00:02,000
Then I enjoy~