I think … not sure because tired … that you are trying to translate something that is not provided for translation.
Indeed, the Marker trait is not proposed in the list. It seems that because a Marker is a fixed value … therefore it can’t be changed. It’s also the same thing for a global property value.
Basically, Grégory is correct. There is no provision for the translation of the values of Markers. This would affect the way that Property Match Strings are evaluated and would break the module.