Complex sentence: As to Danjel's comments on non-English sources, he seems to believe that even where zero sources have been provided, non-sourced material should remain if it is possible that sources may "perhaps" exist in a language other than English.
Split into simpler sentences: As to Danjel's comments on non-English sources, he seems to believe that even where zero sources have been provided, non-sourced material should remain. If it is possible that sources may "perhaps" exist in a language other than English.