Implement Dutch language and issue #2579 #5952

Job	Run time
check-translations	47s
check-openrouter-api-key	1s
knip	1m 1s
compile	1m 20s
test-extension (ubuntu-latest)	1m 49s
test-webview (ubuntu-latest)	1m 36s
test-extension (windows-latest)	3m 6s
test-webview (windows-latest)	3m 10s
integration-test	0s
unit-test	1s
	12m 51s

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