I'm not totally sure about which dimension would have the NULL values you want to exclude, but assuming it's [Laid Paper], you can drag it into Filters and exclude NULL:
This gives you something like this:
As for the titles in Spanish, I'm actually seeing them in English on Tableau Public. Perhaps your computer or browser is set to 'Spanish'?
Hope this helps!
It's not only for laid paper, that was just an example. It's for all of the paper variables for each country that are over 0, ie. not null. Could I drag all of the different papers into this filter to make them not show up as null based on the countries where they are not used? I believe I tried this last night and it didn't work. What do you suggest?
Not sure I totally understand which varieties you need to remove, but I'd try a calculated field like the one below where there's a line for every variety you want to check for. Then set that as a filter for TRUE.