[bkiziuk]

@onueints I have just realized that your original post referred to the addon's description.
The correct behavior should be that when the video playback is started, Kodi tries to load some existing audio & subtitles (embedded or external) based on preferred subtitle language set in Kodi's preferences.
After video is started, addon tries to identify what audio & subtitle language was chosen for this video and then compares it with the preferred setting.
If neither audio language nor subtitle language that match preferred user audio/subtitle language is found, then the subtitle search dialog should be opened.
In your case, the preferred subtitle language is Estonian, but .mkv's audio and subtitles are English. Therefore the addon assumes that you're not satisfied with it and opens dialog for searching.
I'll try to adjust the addon's description bit.