In Wikidata on items, the left column of the description area (where labels, descriptions and aliases are added) shows the language. With my settings for Dutch, most of the languages there are in Dutch, but some are not and shown in English instead. (expand [[ https://www.wikidata.org/wiki/Q56427997?uselang=nl | example ]] + click All entered languages/Alle ingevoerde talen) Two examples are:
* pt-br Brazilian Portuguese -> Braziliaans-Portugees //(submit this to CLDR)//
* be-tarask Belarusian (Taraškievica orthography) -> Wit-Russisch (Tarasjkevitsa orthografie) //Can be added to LocalNames//
Where can I change this? Or can this be changed?
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Review June/July 2021:
Tasked noted on [[https://www.wikidata.org/wiki/Wikidata:De_kroeg#language_names_in_Dutch | Wikidata:De_kroeg#language_names_in_Dutch]] (June 15)
Other items that may be worth checking: [[https://www.wikidata.org/wiki/Q7411?uselang=nl|Q7411]], [[https://www.wikidata.org/wiki/Q55?uselang=nl|Q55]]
Other missing languages to add:
* aeb-arab Tunisian Arabic (Arabic script) -> Tunesisch Arabisch (Arabisch schrift) //Can only be added to LocalNames//
* aoc Pemon -> Pemón
* azb South Azerbaijani -> Zuid-Azerbeidzjaans //Can only be added to LocalNames//
* bfi British Sign Language -> Britse gebarentaal
* bsk Burushaski -> Burushaski
* byq Basay -> Basay
* bzg Babuza -> Babuza
* bzs Brazilian Sign Language -> Braziliaanse gebarentaal
* ckv Kavalan -> Kavalaans
* de-at Austrian German -> Oostenrijks Duits //(can also be submitted to CLDR)//
* de-ch Swiss High German -> Zwitsers Hoogduits //(can also be submitted CLDR)//
* dlm Dalmatian -> Dalmatisch
* en-gb British English -> Brits-Engels //(can also be submitted CLDR)//
* en-ca Canadian English -> Canadees-Engels //(can also be submitted CLDR)//
* fr-be Belgian French -> Belgisch-Frans
* gcf Guadeloupe-Martinique Creole French -> Guadeloups Creools
* kae Ketagalan -> Ketangalaans
* lat-vul Vulgar Latin -> Vulgair Latijn
* sr-ec Serbian (Cyrillic script) -> Servisch (cyrillisch schrift) //Can only be added to LocalNames//
* sr-el Serbian (Latin script) -> Servisch (Latijns schrift) //Can only be added to LocalNames//
* tt-cyrl Tatar (Cyrillic script) -> Tataars (cyrillisch schrift) //Can only be added to LocalNames//
* yrk Nenets -> Nenets
Change are either in LocalNamesNl or CLDR. For the later, one can contact them directly.
An overview is at [[https://www.wikidata.org/wiki/Help:Wikimedia_language_codes/lists/all/in_nl|Help:Wikimedia_language_codes/lists/all/in_nl]]