it’s happening because some kind of language localization is applying to your Output
“FYI Below point could be an issue” Chrome Localization Settings: Chrome might be configured to automatically translate web page content based on your browser language preferences Server-Side Localization: The server responding to your REST call might be dynamically translating content based on some configuration
It turned out that you both were right, the output language on server side was changed without notification, therefor I suspect Chrome to actually change the language back to Eng instead of displaying the response as it was received.