Seeing that this is the Help - English forum then it makes sense to use English :)
If somebody asks on this forum it's better for him if he describes skills numerically, not in English. Because if he uses numbers I can help him, whilst he use english names of skill I ignore his question because I don't know english names ;-)
It's not the same to know English and to know names of skills in English. Because order of skills isn't intuitive.
I know few users from Poland, who of course know Polish but they don't know polish names of skills. Because they joined to BB when polish version wasn't complete and therefore they use only english names and they never teached polish names. And they always ask me to use english names of skills. But I don't know english names so I describe skills numerically and everybody is happy ;-)