Sensitivity labels support local language values, meaning that you can translate the display name and tooltip for labels so that they appear in the language chosen by a user. Most people don't both because it's painfully slow to insert the translated strings for multiple languages. However, when you apply a mixture of PowerShell and the Microsoft Translator service, the task becomes so much easier.
Updates to Outlook clients (desktop, mobile, and OWA) respect the advanced settings in label policy which previously needed the deployment of the unified labeling client. Many organizations want to use mandatory labeling, but have been frustrated because of the lack of support in the Office applications. Now support is available, so it's time to label that email!