Field Group Label

Field Group Label allows you to customize field group label differently for each
node or entity where it's used, just install the module, add new field type
"Field Group Label" (one per label to replace) and locate inside the field group
you would like to override it's label inside the display configuration.

This field won't be rendered on its own, just used to replace it's field group
label.
Also note that if field has empty value, the default label won't be overridden.