Примірка є в ательє.

That is a very common question. In Ukrainian, the present-tense verb бути (to be) is often omitted, especially in simple identity sentences:

• Він студент. = He is a student.
• Книга на столі. = The book is on the table.

So you will also often hear:

• Примірка в ательє.

However, є can still be used. It makes the sentence sound a bit more explicit, and it can slightly emphasize existence or location:

• Примірка є в ательє. = The fitting is in the atelier / There is a fitting in the atelier.

So the version with є is grammatical; the version without it is also very natural.

Примірка is a feminine singular noun in the nominative case here.

In this sentence, it functions as the subject.

Its basic meaning is something like:

• fitting
• trying on
• dress fitting / clothing fitting, depending on context

Because it ends in -а, it follows a very common feminine noun pattern.

Here в means in or at, showing location.

Normally, when в / у means location, the noun after it is in the locative case.

So semantically, ательє is functioning as a locative form here. But there is an important detail:

• ательє is an indeclinable noun

That means its form does not change across cases.

So even though the meaning is in the atelier, the word stays:

• ательє

You do not see a special ending the way you would with many native Ukrainian nouns.

Because ательє is a borrowed indeclinable noun.

Many borrowed nouns in Ukrainian, especially some ending like this, keep the same form in all cases. So you may see:

• в ательє = in the atelier
• до ательє = to the atelier
• з ательє = from the atelier

The preposition and the context show the relationship, even though the noun itself does not change form.

Also, ательє is usually treated as neuter.

Yes, basically. Ukrainian often alternates в and у for euphony—to make speech sound smoother.

So both of these can be possible:

• в ательє
• у ательє

The choice often depends on surrounding sounds and what feels more natural in speech. In your sentence, в ательє is perfectly normal.

It can be understood either way, depending on context.

Because the sentence starts with Примірка, it often sounds more like:

• The fitting is in the atelier

But with є, there is also an existential feel, so in some contexts it may sound like:

• There is a fitting in the atelier

If you wanted a more clearly existential structure, Ukrainian often prefers something like:

• В ательє є примірка.

That more strongly highlights there is.

Yes. Ukrainian word order is flexible, and changing it changes the focus or emphasis.

Compare:

• Примірка є в ательє.
  Focuses first on the fitting.

• В ательє є примірка.
  Sounds more like There is a fitting in the atelier and focuses first on the place.

So the original sentence is fine, but word order is not as fixed as in English.

The stress is:

• примі́рка
• ательє́

So the last syllable of ательє is stressed.

A rough pronunciation guide:

• примі́рка ≈ pry-MEER-ka
• ательє́ ≈ a-te-lye

That final є sounds like ye.

Not usually. Ательє most often means an atelier, especially a tailoring, dressmaking, or fashion studio/shop.

So with примірка, the combination sounds very natural, because fittings are something you would expect in a clothing or tailoring context.

In many situations, ательє suggests a place where clothes are made, adjusted, or fitted, rather than a general workshop.