Due to some bugs Google Translate option appears twice in some Confluence space.

Example

In order to make it corrected to have a single translation option as a normal behavior please follow the below steps

Step 1: Go to Space Tools→Look & Feel option

Step 2: Under Layout option, choose Page Layout and click on Edit

Step 3: There is ID called google_translate element which is called in CSS class here.

Usually we should have only one google translate element, but here we can see we have two elements

Step 4: Here we need to remove this entire Script tag which has the extra google translate element and save it

Step 5: And now the google translate option appears only once.