Mi fidas mian novan koleginon, kaj ŝi diras, ke la kulpo ne estis mia.

In Esperanto, fidi is normally a transitive verb, so it takes a direct object. That means the person you trust is marked with the accusative -n.

So:

• Mi fidas ŝin = I trust her
• Mi fidas mian koleginon = I trust my colleague

English also says trust someone without a preposition, so this part is actually fairly similar.

Because the whole phrase is the direct object of fidas. In Esperanto, when a noun takes the accusative ending -n, any adjectives or adjective-like words that go with it also agree.

So:

• mia → mian
• nova → novan
• kolegino → koleginon

This agreement is very regular in Esperanto, and it helps show which words belong together.

It breaks down like this:

• koleg- = colleague
• -in- = female
• -o = noun ending
• -n = accusative ending

So kolegino means female colleague, and koleginon means female colleague as a direct object.

Because -in- specifically marks that the colleague is female. The sentence later uses ŝi (she), so kolegino matches that.

Esperanto often lets you add -in- when you want to make the sex explicit. So:

• kolego = colleague
• kolegino = female colleague

Ŝi means she. The letter ŝ is pronounced like English sh.

So ŝi sounds roughly like shee.

If someone can’t type Esperanto accents, they may write sxi in the x-system, but standard spelling is ŝi.

Ke introduces a clause meaning that:

• ŝi diras, ke... = she says that...

It works much like English that in indirect statements. Esperanto usually keeps ke where English sometimes omits that.

La shows that this is a specific fault/blame already being talked about or understood from context. So la kulpo means something like the blame or the fault in question.

Without la, it could sound more general or less tied to a particular situation.

Because mia is not a direct object here. After esti (to be), Esperanto uses a predicate complement, not an object, so there is no accusative -n.

Compare:

• Mi vidas mian libron = direct object, so mian
• La libro estas mia = predicate after estas, so just mia

The same rule applies in la kulpo ne estis mia.

In Esperanto, possessive words like mia, via, lia, ŝia, etc. can stand by themselves when the noun is understood.

So:

• mia libro = my book
• la libro estas mia = the book is mine

In this sentence, mia means mine or more naturally my fault / my responsibility, with the noun left understood.

Esperanto does not automatically change tenses just because the main verb is present or past. The tense inside the ke clause shows the time of that action or state itself.

So:

• ŝi diras = she says now
• la kulpo ne estis mia = the blame was not mine at that time

If the speaker wanted to say it is still not mine now, they could say ŝi diras, ke la kulpo ne estas mia.

Not always. In Esperanto, punctuation is somewhat flexible here.

Many writers would omit the comma before kaj:

• Mi fidas mian novan koleginon kaj ŝi diras...

But some writers include it when joining two full clauses, especially for clarity. The comma before ke is much more standard, because it marks the start of the subordinate clause.