Good question!  While canon would say 'no', that would make things<em>reeeeeally</em>awkward.  So yes, you can...but for anything distinctly Barsoomian, it'll be a case of your knowing what they mean even if you don't quite get what they're saying.  (ie a 'karad' is a really long distance, a 'teean' is quite a bit of time, a 'sorak' is some kind of housepet, and so on)