gakugeiin ga setumeisimasu.

It is read がくげいいん.

A breakdown is:

• 学 = がく
• 芸 = げい
• 員 = いん

So the full reading is がくげいいん.

One thing learners often notice is the げいいん part, where vowels come together. Just pronounce it smoothly as ga-ku-ge-i-in, not as separate choppy pieces.

学芸員 usually means a curator, especially someone who works professionally at a museum or art museum.

Depending on context, English translations can vary a little:

• curator
• museum curator
• sometimes broadly museum staff member, though curator is the standard meaning

So it is a specific job title, not just any employee.

が marks the grammatical subject: the person who is doing the explaining.

In this sentence, 学芸員が説明します focuses on the curator as the one who explains.

A very rough nuance difference:

• 学芸員が説明します。
  The curator will explain / It is the curator who will explain.
• 学芸員は説明します。
  As for the curator, they explain / the curator will explain.

Native speakers often use が when introducing the subject or identifying who does the action, and は when the topic is already established or being contrasted.

So が is very natural here.

説明します is the polite non-past form of 説明する, which means to explain.

A useful breakdown:

• 説明 = explanation
• する = to do
• 説明する = to explain
• 説明します = polite form

The non-past form in Japanese can mean:

• present habitual: explains
• future: will explain

So depending on context, 説明します could mean either:

• explains
• will explain

Japanese does not mark future tense in the same way English does.

The non-past form often covers both:

• present actions
• future actions
• habitual actions

So 説明します could mean:

• The curator explains.
• The curator will explain.

Context tells you which one is meant. For example:

• If you are talking about what happens at a museum tour in general, it may mean explains.
• If someone is about to start talking, it may mean will explain.

Japanese often leaves out information that is understood from context.

So even though English often wants something like:

• The curator will explain the exhibit.
• The curator will explain it.

Japanese can simply say:

• 学芸員が説明します。

The thing being explained is omitted because the listener is expected to know it already from the situation.

This is extremely common in Japanese.

The basic structure is:

• 学芸員 = subject
• が = subject marker
• 説明します = verb

So the pattern is:

Subject + が + Verb

Japanese verbs usually come at the end of the sentence. That is one of the most important differences from English.

So instead of:

• The curator explains.

Japanese is literally closer to:

• Curator + subject marker + explains

It is made of two parts:

• 説明
• します

This is a very common pattern in Japanese called a noun + する verb.

Examples:

• 勉強します = study
• 案内します = guide / show around
• 説明します = explain

So 説明 is a noun meaning explanation, and adding する / します turns it into the verb to explain.

Yes. It is polite because it uses します.

Compare:

• 説明します = polite
• 説明する = plain / dictionary form

So:

• 学芸員が説明します。 = polite
• 学芸員が説明する。 = plain

The polite version is appropriate in many everyday situations, announcements, formal settings, and textbook examples.

Yes, it can be natural, but the nuance changes.

• 学芸員が説明します。
  Focuses on who explains.
• 学芸員は説明します。
  Makes the curator the topic, often with a contrastive or topical feel.

For example:

• If someone asks, Who will explain this?
  学芸員が説明します。 sounds very natural.
• If you are already talking about the curator and want to say what they will do,
  学芸員は説明します。 can work.

So both are possible, but が is a better fit when identifying the doer of the action.

No. Standard Japanese is usually written without spaces.

So this sentence would normally appear as:

学芸員が説明します。

Textbooks and beginner materials sometimes add spaces to make it easier to see the parts of the sentence:

• 学芸員
• が
• 説明します

That is a learning aid, not normal adult writing.

Yes, very often.

If the situation already makes it clear who is speaking or acting, Japanese may simply say:

説明します。

This could mean:

• I’ll explain.
• He’ll explain.
• The curator will explain.

Again, context decides the meaning.

Japanese frequently omits subjects, objects, and other information when they are understood.

It is common enough to know, but it is not an everyday word like teacher or student.

You are most likely to see it in contexts like:

• museums
• art galleries
• exhibitions
• cultural institutions
• educational materials

So it is a real and useful word, but somewhat specialized because it refers to a specific profession.