@WarrenBelz unfortunately they are not the same URLs. But let me explain what I'm trying to achieve, I may be going about it the wrong way.
The intent would be a user would view the gallery of brochures, They would then click the image of the brochure that they wanted to view, using the on visible property of the dropdown menu, would then show/hide the dropdown to show you the available languages for that brochure. selecting the language would then display the URL to the digital version of the brochure.
Currently the gallery items property are set using the following ForAll(Distinct('source', Title), LookUp('source', Title=Result)).
The reasoning for this is because some of the brochures on the sharepoint list are the same but the language column and the URL links are all different depending on the brochure. So I was trying to hide the duplicate items from the gallery. Shown below

Which then is the reason why using the distinct formula on the dropdown items property since there was multiple brochures with the same languages.
like I said, maybe I'm approach this the wrong way.
Appreciate it.