عندي سؤال تاني عن الحساب.

A natural Egyptian pronunciation is:

ʿandī soʔāl tāni ʿan il-ḥisāb

A few sound notes:

• ع in عندي and عن is the consonant ʿayn, a deep throat sound with no exact English equivalent.
• سؤال has a glottal stop in the middle: so-ʔāl.
• ح in الحساب is a stronger, breathier h than English h.
• In Egyptian Arabic, ال is usually pronounced il- or el-, so الحساب sounds like il-ḥisāb / el-ḥisāb.

عندي literally means at me or with me.

It is made of:

• عند = at / with / by
• -ي = me / my

So Arabic often expresses I have as something like there is ... at me rather than using a separate verb like English have.

Because Arabic, including Egyptian Arabic, usually does not use a normal verb equivalent to English to have in sentences like this.

Instead, possession is often expressed with words like:

• عندي = I have
• عنده = he has
• عندها = she has

So عندي سؤال... is the natural way to say that you have a question.

The -ي is a pronoun suffix meaning me / my.

So:

• عند = at
• عندي = at me / with me
• عندك = at you
• عنده = at him

This suffix is very common in Arabic and attaches directly to prepositions and nouns.

Because adjectives normally come after the noun in Arabic.

So:

• سؤال تاني = literally question another / question second

That is the normal Arabic word order:

• noun first
• adjective after it

This is different from English, where we say another question.

In Egyptian Arabic, تاني commonly means another, second, or sometimes again, depending on context.

In سؤال تاني, it means another question or a second question.

This is a very common Egyptian word. In more formal Arabic, you would more often see آخر instead.

Because سؤال is a masculine noun, and the adjective agrees with it.

So:

• masculine: سؤال تاني
• feminine: مسألة تانية

In Egyptian Arabic, many adjectives change form this way:

• masculine: -ي
• feminine: -ية / -ة in pronunciation depending on the word

عن usually means about or concerning.

So here it introduces the topic of the question:

• عن الحساب = about the account / bill / check

It is a very common preposition, and it is often used where English uses about.

الحساب can mean several related things depending on context, such as:

• the account
• the bill
• the check
• sometimes calculation / arithmetic

In everyday Egyptian Arabic, when people are talking in a restaurant, shop, bank, app, or service context, الحساب often means the bill or the account. The exact meaning depends on the situation.

Because they play different roles in the sentence.

• سؤال is indefinite because it is a question, not a specific one already identified.
• الحساب is definite because it refers to the account / the bill, something specific in the context.

This is very normal in Arabic:

• عندي سؤال = I have a question
• عن الحساب = about the account / bill

Because ح is a moon letter, not a sun letter.

In Arabic, the definite article ال behaves in two ways:

• with sun letters, the l sound assimilates
• with moon letters, it does not

Since ح is a moon letter, you pronounce the l:

• الحساب = il-ḥisāb / el-ḥisāb

If it were a sun letter, the pronunciation would change.

Yes, it has a clearly Egyptian feel, especially because of تاني.

A more formal or Modern Standard Arabic version would be something like:

• عندي سؤال آخر عن الحساب

So:

• تاني = very common in Egyptian speech
• آخر = more formal / MSA

The rest of the sentence is quite widely understandable, but تاني is the strongest clue that this is Egyptian colloquial Arabic.