Dictionary Fields in embedded HTML on Dashboard

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I have the following problem. I'd like to have a kind of popup field on the dashboard where I can display a field from my Dictionary. The field should be stored in a dictionary so that it's easy to maintain. I would then like to display these value in my popup. How can I access the value from my dictionary within my embedded HTML? Or is that even possible, and if not, is there a workaround to achieve this? Thank you in advance for your help.