Improvements on the dutch translations

Description

There are some typos and mistakes in the ValidationMessages_nl.properties, I'll send a PR.

Environment

None

Assignee

Sanne Grinovero

Reporter

Sanne Grinovero

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Feedback Requested

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backPortable

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Suitable for new contributors

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backportDecision

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backportReEvaluate

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Components

Fix versions

Priority

Minor
Configure