Background of the issue:
I have just moved a site from one server to another. The database was cloned, and the contents of wp-content/languages were copied over. The site has 8 languages, including the default. The issue can be seen at hidden link.
Symptoms:
None of the strings for Portuguese are loading. Anything coming from the database works as expected, and the strings are registered on the string translation page with translations registered, but only the English text appears.
Questions:
Why are the Portuguese translations not loading after the server migration?
How can I ensure that all language strings are correctly displayed after moving the site?