Welcome to Steemit, @imda7thson! Fantastic introduction post with all those pictures! You sound like one rad dude full of energy and creativity and zest for life! Can't wait to see more of your work here. Yes, you can write in any of those languages, and even use the Arabic letters if your device types them. When writing a post in French, tag it with "Fr" in addition to the other tags you use. Arabic does not have its own tag on the list of official tags. Some languages do, and some don't. Also, many people make up their own tags not on the official Steemit list. There are plenty of Arabic speakers on Steemit, so go ahead and write in whatever language you want, and give it a language tag to help people find it. Many multilingual people write an article, and then translate it into their other languages. Go for it, bro! You have a lot to offer the world!
I have upvoted and resteemed this post to help you out. And I'm following you now, too. Cheers!