No need to be sorry friend! your english is just fine, and I think it is so cool that you are able to communicate in multiple languages!
I apologize for the late response, I have gotten so much feedback on these that I have lost comments sometimes and unfortunately yours was lost for a bit, but I see it now! and yes, you should be able to carry pretty much any bulk material in the coal cars, as they are set to "bulk" material type and are not specific on which materials it accepts.
Let me know if you experienced any issues with this and I can try and help! other than that, hope you enjoy!
