I have never selected any other langugue for the iPad except for English (US) and Emoji.
However, I did find a fix for this! If anyone else ever runs into this issue:
I just “Reset all settings”. NOT “Reset all settings and content”. Anyway just resetting the settings removed this phantom added language. You will have to redo all the basic settings BUT all your content and data are still there. Phew.
Thank you all for the replies.