I installed the Yuna (Premium) version of the TTS language, and it worked flawlessly no problem until it switches to the default Korean TTS, Yuna.
If you hear the Korean word and compare to the first TTS voice in setting, you will hear the same, whereas in the third doesn’t
The first TTS is the default Korean TTS, and the third is the premium.
The video that demonstrates my explanation
(https://files.catbox.moe/26l0c5.mov)
Here is the template that goes with it.
<span style="font-family: Gulim; ">{{Korean}}</br>{{tts ko_KR:Korean}}</span><div>{{Audio}}