Just installed J4 Beta.
Downloaded NL language from JC website.
Installed it and pressed the Star.

Result:

1. How is it that you got a nl-NL 4.0.0 lang pack from JC ? Where was it exactly?
2. What is wrong ? What does not work?

@MartijnMaandag translated it and put it on the site to download.
I don't know where it should be, at least not Joomlacode.

translated it and put it on the site to download

on which site? It should not be proposed as j3 update.

Don't know what you mean with J3.
This issue is about J4 and NL language file.
The file is on the JC Downloads page (https://www.joomlacommunity.nl/downloads) as J4 Language Download.

I didn't create the issue, so don't know what the issue is for the creator.
I can just install the language and make it work in J4

Nobody knows what the issue is for the creator because there is not proved any information except of „does not work“.

JC apparently means JoomlaCommunity.nl and not JoomlaCode.org

https://www.joomlacommunity.nl/downloads/joomla-4/90-nederlands-taalpakket-nl-nl-joomla-4-0-0-beta

Having said that I was able to download and install that language pack without any problem and had no problem making it the default language

Ok, the package is NOT on joomlacode. JC for all here is Joomlacode, not joomlaCommunity.nl

And, yes, no problem with the pack, as the screenshots you posted show well.
Not an issue. Closing.

JC apparently means JoomlaCommunity.nl and not JoomlaCode.org

https://www.joomlacommunity.nl/downloads/joomla-4/90-nederlands-taalpakket-nl-nl-joomla-4-0-0-beta

Having said that I was able to download and install that language pack without any problem and had no problem making it the default language

Please help, how can I install this pack? I use joomla4 on mamp local on a macbook.

Just installed J4 Beta.
Downloaded NL language from JC website.
Installed it and pressed the Star.

Result:

ik heb de .zip gedownload maar weet niet hoe te installeren,

Just installed J4 Beta.
Downloaded NL language from JC website.
Installed it and pressed the Star.

Result:

Just installed J4 Beta.
Downloaded NL language from JC website.
Installed it and pressed the Star.

Result:

Just installed J4 Beta.
Downloaded NL language from JC website.
Installed it and pressed the Star.

Result:

Wat moet ik stap voor stap doen om nl pack te installeren? Via install extensies>languages werkt het bij mij niet. Ook niet via install extensies by map, url of web. Voel me een beetje dom worden, ben ik niet hoor, wel nieuw in 4 beta!!

Install extension.

Dank je wel, maar hoe precies install ik welke extension?
Bedoel je deze .xml ? pkg_nl-NL lukt me ook niet!!

For Dutch support please go too:
https://www.joomlacommunity.nl/forum

For English you can go to https://forum.joomla.org

This is for issues within the code base of Joomla, not for General support.
Thank you.

ok