It seems like your site didn't have a complete language file. I have helps you update the English language file. Can you check it for me is this issue is resolved?
I cannot found these in the file you told me. I try to change to use english language at the joomla backend but the word still show like the image I attach in this reply. Do I miss anything?
You're welcome. Glad to hear your issue have been resolved.
If you have anymore question, please don't hesitate to ask us and please create a new ticket. I will mark this ticket as resolved.