Hello Fran O'Prey,
The Wiki module does not support localization. You need to create a custom public control that shows only the items based on CurrentUICulture.
The easiest way to do this is creating an additional metakey which will indicate the item culture ( User Manual
page 219). This metakey will be used as an unique identifier so that the Public control Wiki View will be populated with proper data.
You need to crate a custom control that inherits from Telerik.Wiki.WebControls.WikiView and override CreateDataSource() where you can return an List of items filtered by your custom metakey. You can use GetContent method with IMetaSearchInfo filter.
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