لما وصلت المحل، شفت فستان ابيض وجزمة سودا.

Here لما means when. It introduces a past-time clause: لما وصلت المحل = when I arrived at the shop.

In Egyptian Arabic, لما is very common in everyday speech for this meaning.

Arabic often leaves subject pronouns unstated because the verb already gives that information.

So:

• وصلت = I arrived / you arrived (masc. singular), depending on context
• شفت = I saw / you saw (masc. singular), depending on context

In this sentence, the natural reading is I because the speaker is narrating what happened.

In Egyptian Arabic, وصل can often take the destination directly.

So وصلت المحل literally looks like I reached the shop, but in natural English it is often translated as I arrived at the shop or I got to the shop.

You may also hear وصلت للمحل, with لـ, but the version in your sentence is very normal.

Because Egyptian Arabic usually uses the verb شاف / يشوف for to see.

So:

• شاف = he saw
• شفت = I saw
• شوفت may also appear in some spellings/pronunciations, but شفت is very common in writing

This is different from Modern Standard Arabic, where you would usually learn رأى.

المحل means the shop/store. Arabic uses ال for the.

In context, the speaker is talking about the specific shop they arrived at, so المحل is definite. This is very natural in Arabic.

Also, محل in Egyptian often means shop or store, not just place.

In Arabic, adjectives normally come after the noun they describe.

So:

• فستان ابيض = a white dress
• جزمة سودا = a black shoe

That is the normal noun + adjective order in Arabic.

Because the adjective has to agree with the noun in gender.

• فستان is grammatically masculine, so it takes the masculine form ابيض
• جزمة is grammatically feminine, so it takes the feminine form سودا

In Egyptian Arabic, feminine color adjectives are often shortened compared with Standard Arabic:

• بيضا = white, feminine
• سودا = black, feminine
• حمرا = red, feminine

So سودا is the normal Egyptian feminine form here.

That is very common in informal Arabic writing, especially in dialect.

The more standard spelling is أبيض, but many people write ابيض in casual text and everyday writing. The meaning does not change.

You will see this kind of relaxed spelling a lot in Egyptian Arabic.

Because in Egyptian Arabic, the letter ج is usually pronounced as a hard g, not like English j.

So جزمة is usually pronounced something like gizma or gezma, not jizma.

This is one of the most noticeable pronunciation features of Egyptian Arabic.

Grammatically, جزمة is singular: a shoe.

Its plural is جزم. So if you wanted to say black shoes, you could say جزم سودا.

Depending on context, a singular footwear word can sometimes sound natural in shopping talk, but strictly speaking, جزمة itself is singular.

It is clearly Egyptian Arabic.

The strongest clues are words and forms like:

• شفت instead of a Standard Arabic verb like رأيت
• جزمة for shoe
• سودا as an Egyptian-style feminine adjective

A more Standard Arabic version would look more like عندما وصلتُ إلى المتجر، رأيتُ فستانًا أبيضَ وحذاءً أسودَ.

A simple learner-friendly pronunciation is:

lamma wiṣilt el-maḥall, shuft fustān abyaḍ w gizma sōda

A few useful notes:

• ج in جزمة is a hard g
• و is attached to the next word and here sounds like w = and
• Different Egyptians may pronounce some vowels a little differently, but this is a good practical guide