If the translation is done inside D365 F&SCM usually, the RapidValue element texts are translated from the Business process translation workspace.
The translator can replace the not-yet-translated text with the translation.
Steps
Click Business process translation.
Click the My translations tab.
In the list, find and select the desired record.
Click Edit.
Click the Translation tab.
In the Translated text field, type a value.
Click Save.
Close the page.
Notes
You can also enter a translation separately for each record. To do so:
Select the record.
On the Action Pane, click Manage.
Click Translations to open the drop dialog.
In the list, mark the selected row.
Click OK.