Notification email for blog subscription: Not sent in selected language

Hello,

I'm facing an language issue when user subscribed a blogger.
Our site is in multi-language (our default language + English).

When English is selected on the front-end and user subscribes a blogger, the user receives the subscription confirmation email in default language (Not in English). (FYI: Only subject field is in English.)

Notification email should be in the same language with the front-end language selected by user.
How can I fix this?

Thanks