العربية دي جديدة.

دي means this for a feminine singular noun in Egyptian Arabic.

In Egyptian Arabic, demonstratives like this often come after the noun, not before it as in English.

So:

• العربية دي = this Arabic / this one

  This is very normal in Egyptian Arabic.

A rough comparison:

• Egyptian Arabic: العربية دي
• MSA: هذه العربية

So the word order is different from English, but it is standard for Egyptian speech.

Because Arabic usually leaves out the verb to be in the present tense.

So:

• العربية دي جديدة
• literally: this Arabic new
• natural English: This Arabic is new

This kind of sentence is very common in Arabic.

If you wanted was or will be, then Arabic would usually include a verb.

Because العربية is a feminine noun, so the adjective has to match it.

Arabic adjectives agree with the noun in:

• gender
• number

So:

• masculine: جديد = new
• feminine: جديدة = new

That is why the sentence uses جديدة, not جديد.

Because here جديدة is the predicate adjective: it means is new, not the new.

Compare these:

• العربية دي جديدة = This Arabic is new
• العربية الجديدة = the new Arabic

So in your sentence, جديدة is describing the subject as part of a full sentence, not forming one noun phrase with it.

This is a very important distinction:

• noun + adjective with both definite = usually the new X
• definite subject + indefinite adjective = usually X is new

It is basically:

• العربية دي = the subject, this Arabic
• جديدة = the predicate, new

So the full structure is:

• [subject] + [description]
• العربية دي + جديدة

That is why the sentence works as This Arabic is new, not just this new Arabic.

This is Egyptian Arabic, mainly because of دي.

In Modern Standard Arabic, you would not normally use دي for this. You would use something like هذه instead.

So the Egyptian flavor of the sentence is very clear.

Also, in speech, Egyptians pronounce ج as a hard g sound, which affects how جديدة sounds.

A common Egyptian pronunciation would be approximately:

el-ʿarabeyya di gedīda

A very rough English-friendly guide:

el-a-ra-BEY-ya di ge-DEE-da

A few notes:

• ال is often pronounced el-
• ج in Egyptian Arabic sounds like g in go
• the ع sound in العربية does not exist in English, so learners usually need practice with it

Yes. In Egyptian Arabic, العربية very commonly means the car.

So:

• العربية دي جديدة can very naturally mean This car is new

That is one reason context matters so much in Arabic.

If your lesson has already told you the intended meaning is about Arabic, then follow that meaning. But in real-life Egyptian speech, many people would first understand العربية as the car unless the context makes the language meaning clear.