I was able to find out why explicit was not working for me, but it needs further investigation. It is not language related.
To sumarize, I was using Columns Viewer when I noticed that the labels were not working. Neither "explicit" nor "status" (using the translation) worked there, and using Labels() only returned explicit/incomplete values. The only thing I've changed to fix this is the order in which you get the properties. Now the labels are fetched first. I don't understand how this can affect anything, when I have more time I will investigate if it is related to a specific property read before or the number of properties read before.
But the issue with "Status" is language related. I don't know if this is intended, I remember that using "Status" used to work regardless of the language.
And also labels can't be retrieved from archive files (I tested with zips).