Hello!

I'm using the following statements in a org-mode document:
  #+LANGUAGE: de-de

  #+LATEX_HEADER: \usepackage[AUTO]{babel}

This works fine, especially that the ngerman hyphenation is used (→
'de' is translated to the old (outdated) language rules 'germanb').

To set a really long table I'm using the longtable latex package via:
 #+ATTR_LATEX: :environment longtable  :align |l|r|r|r| :placement [h]

My problem is now that this is emitting the LaTeX code:
  \multicolumn{4}{l}{Continued from previous page}

As I understand this should be translated by org-mode via org-export-
dictionary to the German phrase "Fortsetzung von vorheriger Seite", but
the key 'de-de' is not defined here.

My questions:
1. Is this a bug in Org-Mode 9.1 or 9.4 (both tested)?
2. Or is this still a missing feature? Should the translation
processing includes a conversion for language codes like 'de-de' to a
fallback 'de'.
3. How can I extend in my ~/.emacs  the org-export-dictionary?

Best Regards,

H.-Dirk Schmitt