I purchased in a different language than the one I wanted

You have access to all language options under one single purchase. On the TrillerTV website you can change the commentary language from the hieroglyph icon on the bottom right.

On the TrillerTV mobile apps you can change the commentary language from the text bubble icon on the bottom right.

On the TrillerTV TV apps you have to search for the event name and select the title that has the language you want listed at the end. English is the default language and will be the title without any further text.