Hello,

Apologies for the inconvenience.

We recently updated our invoice system to introduce more flexibility, allowing the invoice layout to be overridden based on customer requirements. However, the language files for non-English languages (including German) have not yet been updated. This is why the invoice content is not currently being translated, even though German is correctly configured in both the frontend and backend.

I’ve discussed this with our development team, and they’ve confirmed that the language files will be updated after the upcoming update. We sincerely appreciate your patience in the meantime.

If you need an immediate workaround, we recommend using Joomla’s Language Overrides to translate the invoice strings manually. You can override the following language constants used in the invoice:

For guidance on creating language overrides in Joomla, you can refer to this tutorial: https://www.youtube.com/watch?v=-_qUGOiYNr0

Please let us know if you need any assistance setting this up.

It's obviously not good that the translation is only partially available. A note about this would be helpful. I've now adjusted all the keys.

However, what I can't find are the language files that are accessed once the invoice is marked as paid. It seems different language files are used for the print version, depending on whether the invoice is outstanding or already paid.

I can't find the keys in the overrides search. Where can I find the keys for the print version?

Hello Sascha,

Sorry for the inconvenience. Could you please clarify whether you are accessing the invoice from the front end or the administrator panel?

Looking forward to your response.

Best regards

Both. Firstly, when I access the invoice via the backend, and secondly, via the link sent to the frontend as soon as the invoice is marked as "Paid."

Important again: The invoices are in English once they have been paid.

Thank you in advance.

Hi There,

Thank you for the clarification, and sorry for the inconvenience you’re experiencing.

Following our recent update to the invoice system, the layout and language handling were made more flexible to allow customization via overrides. However, this also means that language overrides must now be applied separately for both the Site (frontend) and the Administrator (backend). Updating or overriding the language strings in one context will not automatically apply to the other, even if the language constants are the same.

Could you please confirm that the German language overrides are configured in both:

• Extensions → Languages → Overrides → Site (German)
• Extensions → Languages → Overrides → Administrator (German)

If the overrides exist only in one place, the invoice may still fall back to English in the other context—particularly after the invoice status changes to “Paid,” when a different layout/view may be used.

We are also working on improving the default language coverage in an upcoming update to reduce the need for manual overrides.

Thank you for your patience, and please let us know if the issue persists after checking both override areas.

Best regards

Great, thank you so much for the quick reply. Setting the override for both areas fixed it.

Thank you so much!