Tvheadend

hey guys!

i could not find anywhere a answer ... maybe i was just to stupid to find it .. or it does just not work
... so, here is what i would like to do:

- i have to stream the tvheadend channels to a kodi-tvheadend-client
-- i have a 4096kbps max pass-through limitation on the client downstream
---- basically i have 10mbps downstream.. but since i want to surf the web parallel, i figured out, 4mbps works fine
---- the tvheadend server side has an insane upstream .. but irrelevant here

> this works fine for a profile i created
container: matroska (mkv)/av-lib
- channels: stereo
- language: english
- video codec: libx264:...
- video codec preset: ultrafast h.264/ h.265
- video bitrate: 4096
- audio codec: acc
- audio bitrate: 0
--> ok, the passthrough might be higher than the mentioned 4096kb above .. still works fine

issue here: i get only the english audio channel delivered to the client
-> which is a bit of a pain, because sometimes i would like to hear other languages

my question would be: how do i get more languages to the client, so i can select during playback, which language i would like to listen to?
- basically i would probably like to have at least audito-track 1 + 2, since those are usually the "home-language" and the "original-language"
- (e.g. a american movie usually is dubbed in german in audio-track 1 and in english on audio-track 2)

options i can imagine is something like:
a) i transcode multiple languages to the stream
b) i transcode only video and add the "raw" audio to the stream

so, how do i do this?
(i hope the answer is not a simple "no, does not work")