Jeśli chodzi o słownictwo, ten rozdział jest dla mnie łatwiejszy.

Yes, jeśli normally means if. But jeśli chodzi o is a very common fixed expression meaning:

• as for
• when it comes to
• regarding

So in this sentence, Jeśli chodzi o słownictwo means when it comes to vocabulary.

Word-for-word, it originally looks like if it goes about, but you should really learn jeśli chodzi o as one unit.

Good question. The preposition o can take different cases depending on meaning and the expression it appears in.

Here, chodzić o is a fixed expression meaning to be about / to concern and it takes the accusative.

So:

• chodzi o co? → o słownictwo

The reason słownictwo looks unchanged is that for this noun, the nominative and accusative forms are the same.

Compare:

• Rozmawiamy o słownictwie = We are talking about vocabulary
  
  • here o takes the locative
• Chodzi o słownictwo = It is about vocabulary / It concerns vocabulary
  
  • here o takes the accusative

So both patterns exist, but they mean different things.

Yes. Słownictwo is a normal and common word for vocabulary.

It can mean:

• the vocabulary in a text, chapter, or course
• a person’s vocabulary
• the vocabulary used in a certain field

In this sentence, it means the vocabulary used in the chapter.

A related word is słowo = word.
So very roughly, słownictwo is the collection of words, i.e. vocabulary.

Because rozdział is a masculine singular noun, and ten is the matching demonstrative adjective meaning this.

So:

• ten rozdział = this chapter

If the noun had a different gender, the form would change:

• ta książka = this book
• to słowo = this word

Since rozdział is masculine, you need ten.

Because the sentence means easier, not just easy.

• łatwy = easy
• łatwiejszy = easier

So:

• ten rozdział jest łatwy = this chapter is easy
• ten rozdział jest łatwiejszy = this chapter is easier

Polish often forms comparatives with a special comparative ending instead of using a separate word like English more.

Because the adjective has to agree with rozdział.

Rozdział is:

• singular
• masculine

So the adjective must also be masculine singular:

• łatwiejszy

Compare:

• ta lekcja jest łatwiejsza = this lesson is easier
  
  • lekcja is feminine
• to ćwiczenie jest łatwiejsze = this exercise is easier
  
  • ćwiczenie is neuter

This is standard adjective agreement in Polish.

In Polish, just like in English, the second part of the comparison can be left out if it is obvious from context.

So łatwiejszy here means something like:

• easier than another chapter
• easier than the previous one
• easier than I expected

The sentence does not say exactly what the comparison is, because the speaker assumes it is already clear.

If you want to state it explicitly, you can add:

• niż poprzedni = than the previous one
• od poprzedniego = than the previous one

For example:

• Ten rozdział jest dla mnie łatwiejszy niż poprzedni.

Yes, literally it means for me, but in natural English here it often corresponds to:

• for me
• to me
• I find ...
• in my view / from my perspective

So:

• ten rozdział jest dla mnie łatwiejszy
  = this chapter is easier for me = I find this chapter easier

It shows that the judgment is personal. The chapter may be easier for this speaker, not necessarily for everyone.

Because dla mnie is the normal way to express for me in this kind of sentence.

• dla mnie = for me
• mi is a dative pronoun meaning to me or sometimes an unstressed for me, but it does not fit naturally here in the same way.

So:

• Ten rozdział jest dla mnie łatwiejszy = correct and natural

Using mi here would sound wrong or at least unnatural.

Think of dla mnie as the phrase used for personal perspective or suitability:

• To jest dla mnie ważne = This is important for me
• To jest dla mnie trudne = This is difficult for me

Because Jeśli chodzi o słownictwo is an introductory phrase that sets the topic, and it is separated from the main clause by a comma.

So the structure is:

• Jeśli chodzi o słownictwo, = As for vocabulary,
• ten rozdział jest dla mnie łatwiejszy. = this chapter is easier for me.

This kind of comma is very normal in Polish.

Yes. Polish word order is more flexible than English, although some versions sound more natural than others depending on emphasis.

The given sentence:

• Jeśli chodzi o słownictwo, ten rozdział jest dla mnie łatwiejszy.

puts słownictwo first as the topic: when it comes to vocabulary.

You could also say, for example:

• Ten rozdział jest dla mnie łatwiejszy, jeśli chodzi o słownictwo.

This is understandable, but it sounds a bit different in emphasis. The original version is very natural if you want to introduce the area you are talking about first.

There are alternatives. Some common ones are:

• Pod względem słownictwa = in terms of vocabulary
• Jeżeli chodzi o słownictwo = same as jeśli chodzi o, just with jeżeli instead of jeśli
• Jeśli idzie o słownictwo = another variant, a bit less common in some contexts

So you could also say:

• Pod względem słownictwa ten rozdział jest dla mnie łatwiejszy.

That means almost the same thing.

Here, jest is necessary.

Polish often omits to be in the present tense only in some special structures, especially in colloquial speech or in sentences like:

• To mój brat = This is my brother

But with an adjective like łatwiejszy, you normally need jest:

• Ten rozdział jest łatwiejszy.

Leaving it out would sound incorrect in standard Polish.

Yes. It sounds natural and correct.

It is a normal way to say that, in terms of vocabulary, this chapter feels easier to the speaker. It has a slightly careful, explanatory tone, which fits well in discussions about learning, textbooks, or language difficulty.