How to switch on DVD subtitles?

I just for the first time got myself a set of DVD discs to play old TV series from.
To make it possible in Kodi I converted the disk to ISO format and Kodi on OSMC plays this just fine.
But I would like to switch on the display of the Swedish subtitles, how can this be done?
I am using an IR remote to control the Kodi via a FLIRC interface.
The problem I have is that I don’t see any way to reach a menu where one can enable the subtitles…

Please search/investigate Kodi support issues in their provided wiki/documentation before creating threads that are not specific to OSMC.

This is a Kodi specific issue that you should address there. OSMC has no bearing on your problem. More relevant info should be available there.

http://forum.kodi.tv/index.php

http://kodi.wiki/view/subtitles

OK, I thought that if I ran OSMC I would ask here.
But I will head for the KODI forum now.