'Language Equals' setting not considered when comparing missing and embedded subtitles

[karstenaune]

Describe the bug
If language A is set to equal language B, movies that contain language A still report language B as missing.

To Reproduce
Steps to reproduce the behavior:

1. Go to Languages under Settings and set up an Equals rule between two languages (A = B).
2. Create a Language Profile looking for language B.
3. Find a movie that contains language A but not B, and assign it the language profile you created in the last step.
4. The movie still reports language B as missing, even though A = B and the movie contains A.

Expected behavior
If I tell Bazarr that language A = B, then I expect it to consider movies that contain language A to also contain language B.

Screenshots
Equals rule saying Norwegian Bokmål = Norwegian.

Movie containing Norwegian Bokmål still considers Norwegian missing.

Software (please complete the following information):

• Bazarr: 1.5.1
• Radarr version 5.17.2.9580
• Sonarr version 4.0.12.2823
• OS: Ubuntu 24.04.1 LTS (Linux-6.8.0-51-generic-x86_64-with-glibc2.39)

[hnorgaar]

Only use the target language in lang profile aka "Norwegian" and possibly need to reindex subs on disk in tasks As all subs will now be named .no, so you will need to rename them manually from NB to NO and Equal only work in search, not with indexing.
You can also search and delete all with NB and let Bazarr search again for them

[karstenaune]

NB to NO and Equal only work in search, not with indexing

Should this be a feature request then?
Because the problem I'm having is that newly added shows or movies sometimes have NB subs embedded. Since my default language profile looks for NO subtitles, it will mark them as missing, and download what are essentially a duplicate set of Norwegian subs.
These might be lower quality compared to the embedded subs, and when viewing the content its impossible to know which one to choose.