Subscriptions: language issues in latest Posts block

- Post: https://make.wordpress.org/community/2020/12/01/highlighted-posts/
- Site is set to `en_US`
- Subscriber's wpcom language is set to English.
- The email's language is English, all buttons around the post content are in English

Yet, the post meta data inside the latest posts is in Spanish:


Start by reproducing the subscription email using the linked post with both the site and subscriber language set to English, then trace the latest Posts block that renders the post metadata. Done means the metadata and surrounding controls use English consistently in the email; the issue does not name a source file or test to run.

Written by the indexing model from the issue text.