La reflekto aperas same kiel ĝi aperis en la portreto.

Because same is an adverb, and it modifies the verb aperas (appears).

• sama = same as an adjective, used with a noun
• same = in the same way / similarly, used with a verb, adjective, or another adverb

So:

• La reflekto aperas same... = The reflection appears the same / in the same way...

If you said La reflekto aperas sama, that would sound less natural here, because the idea is about how it appears, not directly describing reflekto with an adjective.

Here kiel means as or like in a comparison.

So same kiel means:

• the same as
• in the same way as

In this sentence:

• La reflekto aperas same kiel ĝi aperis...
• The reflection appears the same as it appeared...

This is a very common Esperanto comparison pattern:

• tiel... kiel... = so/as... as...
• same kiel... = the same as...
• pli... ol... = more... than...

Ĝi is the third-person singular pronoun for things, animals, or abstract nouns when li and ŝi are not appropriate.

Here, ĝi refers back to la reflekto, which is a thing, so ĝi is the normal choice.

• la reflekto = the reflection
• ĝi = it

So:

• ĝi aperis = it appeared

Because the sentence contrasts a present situation with a past one.

• aperas = present tense = appears / is appearing
• aperis = past tense = appeared

So the structure is:

• now: the reflection appears
• before: it appeared in the portrait

That gives the sense:

• The reflection appears the same now as it appeared in the portrait before.

Esperanto tenses are straightforward:

• -as = present
• -is = past
• -os = future

No. Aperi means to appear, to show up, or to seem visible. It is not the same as esti (to be).

Compare:

• La reflekto estas klara. = The reflection is clear.
• La reflekto aperas klara. = The reflection appears clear.

In your sentence, aperas suggests how the reflection looks / presents itself, not simply what it is.

La is the definite article, meaning the.

So:

• la reflekto = the reflection
• la portreto = the portrait

Esperanto has only one definite article: la. It does not change for gender, number, or case, although the noun itself may change:

• la libro = the book
• la libroj = the books
• la libron = the book as a direct object

In your sentence, both nouns are specific things already understood in context, so la is used.

Yes, literally en la portreto means in the portrait.

• en = in
• la portreto = the portrait

In English, we might also say in the portrait or in the picture, depending on context. Esperanto uses en naturally here to mean something appears within the image / inside the depiction.

It is very close in meaning. Portreto means portrait, usually an artistic or visual representation of a person.

Because Esperanto has many words that resemble European-language vocabulary, portreto is easy for English speakers to recognize. But as always, it is best to learn it as an Esperanto word with its own usage rather than assuming every nuance is identical in all contexts.

Possibly, but the meaning would shift slightly.

• same = the same / in the same way
• simile = similarly

So:

• aperas same kiel... = appears the same as...
• aperas simile al... or simile kiel... = appears similarly to...

Same suggests stronger identity or exact likeness. Simile suggests resemblance, but not necessarily exact sameness.

Yes, Esperanto word order is fairly flexible, but this order is the most straightforward and natural.

The basic structure is:

• La reflekto = subject
• aperas = verb
• same kiel ĝi aperis en la portreto = comparison phrase

So it works like:

• The reflection appears the same as it appeared in the portrait.

You could sometimes move parts around for emphasis, but for learners, the given order is the clearest and best to imitate.

Yes. Reflekto is the standard noun for reflection.

It can refer to:

• a visual reflection, such as in a mirror or water
• sometimes also a more abstract reflection, depending on context

Here it clearly means a visible reflection.

Related forms include:

• reflekti = to reflect
• reflekta = reflective
• reflekto = reflection

A good breakdown is:

• La reflekto = The reflection
• aperas = appears
• same kiel = the same as / in the same way as
• ĝi = it
• aperis = appeared
• en la portreto = in the portrait

So the full structure is:

• The reflection appears the same as it appeared in the portrait.

This kind of piece-by-piece parsing is very useful in Esperanto, because many meanings are built very regularly from word endings and simple connectors.