There should be s button in the remote labelled "menu" or something similar. You might be able to wing it through the various setup options and find the language selection like that. It may help with a manual - even one for a similar model. If you don't have your manual you might find one here:
https://www.manualslib.com/brand/orion/tv.html
This might be interesting/useful
https://www.avforums.com/threads/orion-tv-products-help-and-advice.635155/
Phdsr, May 2020