We're getting into advanced topics now!
There's a component in DM Studio called Customize. Using that, you can see where the standardization definition transformation is making the change you see. In the case of "Salah al din" for example, there's a standardization scheme called "EN Given Names (Abbreviations Standardization)" that is being applied to the name. It takes "din" and changes it to "D I N" for some (I'm sure a very good) reason (at least in most cases). So to change the behavior, you could modify the standardization definition and remove the scheme altogether (not advised) or you could edit the scheme to adjust this behavior by removing the transformations that don't make sense for your scenario. Back up the scheme file and definition first if you plan to make changes.
Attached images show the step in Customize that made the unwanted change and the scheme value itself.
Ron
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