23w03a/1.19.4: Translation fallback field

[ejm]

In the newest Snapshot, Mojang introduced a change to translate components, a fallback field which contains a string to be used in the event that a translation key can't be found.

Full information can be found here:

Added an optional fallback field to translate text components.

• The new field is a string that will be used in place of translation if it is missing
• If fallback is missing, the old behavior (i.e. using the key itself as the translation) is preserved

Thanks!

[zml2008]

Fixed in #868