Notes
Custom labels enable developers to create multilingual applications by presenting information (for example, help text or error messages) to users in their native language. A custom label is a custom text value that can be accessed from Apex classes, Visualforce pages, and Lightning components. If Translation Workbench is enabled for your Salesforce org, you can translate these labels into any of the languages that Salesforce supports. You can create up to 5,000 custom labels, and each label can have up to 1,000 characters.