هاي مو الصفحة الصح.

هاي means this for a feminine noun in many Levantine varieties.

Since صفحة (page) is feminine, the speaker uses هاي rather than a masculine form like هاد.

So:

• هاي = this (feminine)
• هاد = this (masculine)

A native speaker is basically saying This is not the right page.

In Arabic, nouns have grammatical gender. صفحة is a feminine noun, which is why the demonstrative has to match it.

That is why you get:

• هاي الصفحة = this page

and not:

• هاد الصفحة

A very common sign of a feminine noun is the ـة ending, and صفحة has that.

In Arabic, especially in the present tense, you usually do not say a separate word for is / are.

So a sentence like:

• هاي الصفحة الصح

literally looks more like:

• This the right page

But in natural English, it means:

• This is the right page

To negate that, Levantine uses مو, so:

• هاي مو الصفحة الصح = This is not the right page

مو is a very common Levantine way to say not in this kind of sentence.

Here it negates the whole statement:

• هاي الصفحة الصح = this is the right page
• هاي مو الصفحة الصح = this is not the right page

So مو is doing the job of isn't / not here.

Yes, very often you can.

Many speakers use مش instead of مو, depending on region and personal habit. So you may also hear:

• هاي مش الصفحة الصح

Both are natural in Levantine speech.
Very roughly:

• مو is extremely common in many Levantine areas
• مش is also widely understood and widely used

If you're learning one form first, مو is perfectly good for this sentence.

الصح means the right one / the correct one.

In this sentence, it describes الصفحة, so the whole phrase:

• الصفحة الصح

means:

• the right page
• the correct page

In spoken Levantine, صح is very common for correct / right.

Great question. In formal Arabic, you would expect full adjective agreement, and you would say:

• الصفحة الصحيحة

In everyday Levantine, though, speakers very often use صح as a common colloquial adjective meaning right/correct, and it often stays the same form instead of changing like a more formal adjective.

So in spoken Levantine:

• الصفحة الصح = very natural

In more formal Arabic:

• الصفحة الصحيحة

Both relate to the same idea, but الصح sounds much more conversational.

Because ص is a sun letter. When الـ comes before a sun letter, the l sound assimilates to the next consonant.

So:

• الصفحة is pronounced more like eṣ-ṣafḥa
• الصح is pronounced more like eṣ-ṣaḥ

You still write ال the same way, but in speech the l disappears into the following sound.

A simple approximate pronunciation is:

• haay moo eṣ-ṣafḥa eṣ-ṣaḥ

Very roughly:

• هاي = haay
• مو = moo
• الصفحة = eṣ-ṣafḥa
• الصح = eṣ-ṣaḥ

The ḥ sound is the strong Arabic ح, not the normal English h.

This sentence is clearly colloquial Levantine.

Signs of that include:

• هاي instead of formal هذه
• مو instead of formal negation
• الصح instead of the more formal الصحيحة

In Modern Standard Arabic, the equivalent would be:

• هذه ليست الصفحة الصحيحة

So the sentence you gave is the everyday spoken version, not the formal written one.

Yes. Levantine has regional variation.

Depending on where the speaker is from, you might hear:

• هاي
• هيدي

Both can mean this for feminine nouns.

So another natural version could be:

• هيدي مو الصفحة الصح

Same meaning, just a different regional form.

Yes, but the version you have is very natural and straightforward.

• هاي مو الصفحة الصح = This is not the right page.

You may also hear slightly different structures in conversation, but this one is simple and common because it starts with the thing being pointed out: this.

It is especially natural when someone is looking at a screen, book, form, or website and realizes it is the wrong page.