Hello everybody!
When I personally look at different languages and compare among them, some patterns appear clear to me.
I believe the most important aspect of a language is: How it is pronounced. Pronunciation brings depth and extra meaning to the sound you make. As humans, were are able to tune these sounds and make them meaningful. Writing does not bring that level of depth to the table.
Different nations, living in so many different environments are greatly affected by these environments. Their languages affected the most. It is not strange then that people living in mountains use completely different set of sounds to communicate, in comparison to people living in deserts or next to open sear shores. This is why we have the Bird Language (an actual human language, using whistles and melodies to communicate) link to the wikipedia of the bird language below. Also, you have the clicking Khoisan language that uses click consonants as phonemes, also link to the wikipedia below.
At this point, we can agree that different elements of the environment or nature affect the language and sometimes create it out of necessity. So, how can we preserve a language? This question was never a question in past civilizations, because the external effects to diminish a language don't normally materialize within short periods of time. It take a very long and slow process for a civilization to adopt new words and start using them to a point where their original language is at least moderately changed. However, many languages today are changing at alarming rates as we speak. Look at how your son or daughter speaks today, and you will notice that his or her words are greatly affected by the "internet language" which I like to call the "Engnet Language". Many children in the Middle East, Africa, and far-east Asia don't even use their own language to communicate with one another anymore. They use Engnet. This is so scary. Many languages we have now will disappear in the next few generations if countries and governments don't take serious actions to preserve the purity of their languages, and again, this is not to say that languages have to be static. They are dynamic in nature, but you will have to define the acceptable levels of change.
So, why Arabic is special?
I'm not sure if you've heard the "Holy Quran". I'm not here to preach about Quran, or if it is a Holy Book or not, I only look at it from a purely linguistic angle in this article. If you've heard a recitation of Quran, from different reciters, you'd notice that the pronunciation is identical, all famous reciters will pronounce the same words exactly in the same way. The melody can be extremely different, but the word pronunciation is exactly the same. When you learn how to recite Quran, you learn exactly how to place your tongue and how you open your mouth and how you breathe, so your pronunciation exactly matches your teacher's. And in case you know of any reciter who is pronounces words differently, know that he/she is not a real Quran reciter, or you have a problem with your hearing, and you need to check your ears. This consistent and intrinsically woven part of learning Quran does have great effects on how the Arabic Language is pronounced and that will save the language from drastic changes as long as there are few who study Quran and pass it to their children and grandchildren.
Conclusion
Having said that, I don't think Arabic will suffer as badly as many other languages in the few decades to come. Please try to preserve your language. Please stop your children from butchering it. As long as pronunciation is preserved, the essence of the language will be preserved. Keep your language and heritage save for the next generations, so they could feel part of your own existence.
Have a great day.