You must do this step before installing the template.

Use the code that you got after changing template setting, paste all that template code to SpotLingo. Then click Scan Template button.

In next window, take a look the current text on left column and input your texts on right column, then click Apply Translated Texts button.

Finally, copy all code from Translated Template Code field to use for another purposes.

Note: remember save also the Backup Translated Code, so you can re-apply your translation when you updating template.