Header fields in event export are not being translated

One-sentence description

If you export an event the headers of the export are not translated whereas some of the fields in the export are.

Why?

Some fields are now in English while others are in Dutch. This looks messy.

Current implementation

Header fields in the export are not translated.

Desired implementation

Header fields are also translated depending on the chosen language.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information