Thank you for using Fiddler Everywhere and for the provided feedback. At this very moment, there is no option to change the language via the UI or via certain common steps. Marking this one as a feature request so keep track of this issue for more details.
Once again thanks for being a valued customer!
Regards,
Nick Iliev
Progress Telerik
Progress is here for your business, like always. Read more about the measures we are taking to ensure business continuity and help fight the COVID-19 pandemic. Our thoughts here at Progress are with those affected by the outbreak.