Glossary translations: localise 'n.d.' in in-text citations #1088

The Conflict of interest definition cited "(DOAJ, 2018)", but its listed reference is an undated DOAJ web page. The Glossary sheet now reads "(DOAJ, n.d.)" in all five languages. The Arabic "DOA" typo is also fixed. The change goes live with the glossary regeneration in #1084.

"n.d." is the English abbreviation for "no date". The translations may want the local form, for example German "o. J.". The same applies to other in-text citations of undated sources across the translated glossaries.

Suggested next step: ask the German, Arabic, Chinese and Turkish teams which abbreviation they use for undated sources, then replace "n.d." in their *_def cells in the Glossary sheet (tab glossaries) and regenerate. Reference lists are formatted from the shared BibTeX in English and would stay as they are.