How to translate messages in DB?

Translations are stored within the database. No, please don’t fiddle in it directly.
Instead, use the translation endpoint within the admin menu of Zammad.

You can find more information on this page regarding this topic:
https://admin-docs.zammad.org/en/latest/system/translations.html

You can also push your translations to the central translation server of Zammad to help other Zammad users.
Source: Change Translations

How to translate messages in i.e. zammad/db/seeds/triggers.rb ?

I can’t find “Thanks for your inquiry” in the translation endpoint within the admin menu of Zammad.

Unfortunately, the doc don’t help :disappointed_relieved:

You can also push your translations to the central translation server of Zammad to help other Zammad users.
In the french interface, it’s not obvious how to do that :thinking:

Sorry but that’s not possible.
Zammad can’t know the language context in those situations (e.g. if a new customer writes you, we can’t detect / determine what language we would have to use).

This is the reason triggers are in one language.
If you want it to be in your specific language, you’ll have to translate the existing ones or create new ones and ensure you have a possibility on how to provide a specific language.