Hi techithome, thanks for your question - I apologize for such a late reply.
You are correct in using the class, "notranslate", although in this case you would most likely need to edit the code in your reservations calendar plugin (this reservations calendar is a plugin, right)
Depending on how many areas that need to be adjusted could be somewhat timely, but I will take a look for you and give you an idea if this is complex or not.
If you would like me to look, I would need admin rights with new user and password setup so that I could see the Dashboard of your website:
You can send login details here if you want:
Let me know if I can be of further assistance.