Form missing translations and new text missing from Norwegian languagefile

Description

Steps to reproduce

1. Install Episerver.Form.
2. Create a form in English language with some form elements.
3. Switch to a different language.

Expected: The form is translated to specified language.

Actual: Only English texts are shown.

Some examples (from the English language file):
<conditioncombination>
<caption>ConditionCombination</caption>
<help></help>
</conditioncombination>
<conditions>
<caption>Conditions</caption>
<help></help>
</conditions>
<finalizedsubmissionretentionperiod>
<caption>FinalizedSubmissionRetentionPeriod</caption>
<help></help>
</finalizedsubmissionretentionperiod>
<partialsubmissionretentionperiod>
<caption>PartialSubmissionRetentionPeriod</caption>
<help></help>
</partialsubmissionretentionperiod>
<satisfiedaction>
<caption>SatisfiedAction</caption>
<help></help>
</satisfiedaction>
But not in Norwegian
Using Episerver.Forms 4.20.0