Severity is translated

Problem/Motivation

In the logs, the severity field becomes translated. When analyzing logged data it becomes a problem. It becomes more complicated than it should. Something like ... WHERE SEVERITY IN ("ERROR", "VIRHE", "VIGA", "FEL", "ERRORE", "エラー"). When analyzing logs, or creating alerts, I always use one language. There might be more translated items like this.

Steps to reproduce

1. Enable and configure at least one language in addition to English on a site
2. Install and configure jsonlog
3. Make sure PHP warnings are logged
4. Insert a minor fault anywhere in the codebase like $a = $b; that triggers "Undefined variable $b".
5. Visit some non-English page that triggers that code
6. Check the json file. Check the severity value in the json entry.

Proposed resolution

Do not translate log entries, it's detrimental to analysis.

Remaining tasks

User interface changes

API changes

Data model changes