Salesforce has two different desktop user interfaces: Lightning Experience and Salesforce Classic. This article is designed for Lightning Experience.
Rename Field Labels in the Deal
1: Go to set up
2: In the setup search under Translation Workbench click on Override
3: Package, Select the package to be overridden in this case we are overriding the deal, select DealerTeam Package.
4: Setup Component, Select the component to be edited, in this case, we will be selecting Custom Field.
5: Object, Select the object to be edited, the custom fields in this tutorial we are editing are in the Deal Object.
6: Aspect, To edit the field label, select it.
Field Label Overrides, Master Field Label is the current value of the field.
Double click in the override column to enter new values. You can tab to jump to the next row. Click Save
Results: This process changes the Field Label name in the deal.