While there is no global setting that would allow you to change the report's language, you can do it manually. If you want to use this report multiple times for different clients, you only have to do it once, as the report can be saved as a team template.

Step 1. If you wish, you can change the widget title or description like so:

Step 2. If you wish for the metric name to be in the language that you want, you would need to re-name it by clicking here: