In brief: After enabling the MULTI-LANGUAGE FEATURE should you later wish to remove Multiple Languages please follow the steps below to disable this feature.
Find the Template you wish to disable the language feature and select Edit.
Scroll down to Advance Options and unselect the language options previously enabled.
If you attempt to save immediately after this change, you may receive the following error message:
This error is a result of copy being required in all of the fields in which other languages have been previously enabled. I.e. The tour description, EzBook description, and Tours Cross-Sell description. You can simply add some spaces as the system will understand it as characters in that field.
Save! Your edits have saved correctly when you receive this message: