La petanto atendas pro tio, ke la konsulo kontrolas alian peton.

Petanto comes from the verb peti = to request / to apply.

It is made like this:

• pet- = the root
• -ant- = a present active participle element, meaning someone who is doing the action
• -o = noun ending

So petanto literally means a person who is requesting / applying.

In natural English, that is often translated as applicant or requester, depending on context.

They come from the same root pet-, but they are different kinds of words:

• petanto = applicant / requester → a person
• peto = request / application → the thing being requested or submitted

In the sentence:

• La petanto = the applicant
• alian peton = another application/request

So one word refers to the person, and the other refers to the application itself.

The ending -n marks the direct object in Esperanto.

Here, the verb kontrolas means checks / is checking, and the thing being checked is alian peton.

So:

• la konsulo kontrolas alian peton
• the consul is checking another application

Because peton is the direct object of kontrolas, it takes -n.

In Esperanto, adjectives agree with the nouns they describe in both:

• number
• case

Since peton is singular and accusative, alian must match it:

• alia peto = another application
• alian peton = another application (as a direct object)

That matching is a basic Esperanto rule.

Here alia means another or a different.

So alian peton can mean:

• another application
• a different application

Both ideas fit the Esperanto word alia.

Pro tio, ke means something like because of the fact that or simply because.

So:

• La petanto atendas pro tio, ke...
• The applicant is waiting because...

A learner should know that ĉar could often be used here too:

• La petanto atendas, ĉar la konsulo kontrolas alian peton.

That would also be correct and is often simpler.

The phrase pro tio, ke is a little more explicit and literally contains:

• pro = because of
• tio = that / that fact
• ke = that

So it is essentially because of the fact that...

Yes, it is a common pattern in Esperanto.

You can think of it as:

• pro tio, ke ... = because ... / due to the fact that ...

It introduces a reason.

Learners often compare it with:

• ĉar = because
• pro
  • noun = because of

For example:

• Li malfruis, ĉar pluvis. = He was late because it rained.
• Li malfruis pro la pluvo. = He was late because of the rain.
• Li malfruis pro tio, ke pluvis. = He was late because it rained / because of the fact that it rained.

In Esperanto, a comma is normally used before a subordinate clause introduced by words like ke.

So in:

• pro tio, ke la konsulo kontrolas alian peton

the comma helps mark the start of the clause introduced by ke.

This is very standard Esperanto punctuation.

Yes. Esperanto -as covers both the simple present and the English progressive in many contexts.

So kontrolas can mean:

• checks
• is checking

depending on context.

In this sentence, English would often naturally say is checking, because it describes an action happening right now. But Esperanto does not need a separate progressive form.

The same applies to atendas:

• atendas = waits or is waiting

Here, the natural English meaning is is waiting.

Esperanto word order is fairly flexible because grammatical endings show the roles of words.

The normal order here is:

• La petanto atendas pro tio, ke la konsulo kontrolas alian peton.

That is clear and natural.

You could change the order for emphasis, but the standard version is the best one for learners. For example, Esperanto can move elements around more freely than English, especially when the -n ending keeps things clear.

Still, in ordinary usage, this sentence is already in a very natural order:

• subject
• verb
• reason clause

La is the definite article, meaning the.

So:

• la petanto = the applicant
• la konsulo = the consul

It is used because both are understood as specific people in the context.

Esperanto has only one definite article: la. It does not change for gender, number, or case.

Yes, konsulo normally means consul, the official diplomatic title.

A native English speaker might wonder whether it could mean counselor, but it usually does not. Those are different words.

So if the sentence uses konsulo, the meaning is specifically consul.

Yes. A common simpler version would be:

• La petanto atendas, ĉar la konsulo kontrolas alian peton.

This means the same thing in a straightforward way.

The original sentence with pro tio, ke is not wrong at all; it is just a slightly more expanded way to express the reason.