Bazı insanlar küçük hatalara gülüyor.

Word by word:

• Bazı = some
• insanlar = people / humans
• küçük = small / little
• hatalara = to mistakes or, with this verb, at mistakes
• gülüyor = is laughing / laughs

A very literal structure is:

Some people small mistakes-to laugh-yor

Natural English: Some people laugh at small mistakes.

Because the verb gülmek normally takes the dative case when it means to laugh at someone or something.

So:

• hata = mistake
• hatalar = mistakes
• hatalara = to / at mistakes

In English we use the preposition at. In Turkish, that idea is shown by the ending -a / -e instead.

This is just how the verb works in Turkish.

Many Turkish verbs require a particular case on the noun that follows them.
With gülmek in the sense of laugh at, Turkish uses the dative:

• bana gülüyor = he/she is laughing at me
• ona gülme = don’t laugh at him/her
• hatalara gülüyor = he/she laughs at mistakes

So even though English says laugh at, Turkish does not use a separate word for at here. The case ending does that job.

It has three parts:

• hata = mistake
• -lar = plural
• -a = dative case

So:

hata + lar + a → hatalara

This means to mistakes or, with gülmek, at mistakes.

No. In Turkish, adjectives do not agree with nouns in number or case.

So küçük stays the same in all of these:

• küçük hata = small mistake
• küçük hatalar = small mistakes
• küçük hatalara = at small mistakes

Unlike in some languages, the adjective does not get a plural ending.

For this meaning, bazı insanlar is the normal form.

• bazı = some
• insanlar = people

So bazı insanlar = some people

Using bazı insan would sound unnatural here, because you are talking about more than one person. Turkish usually uses a plural noun after bazı when the meaning is clearly plural.

Compare:

• bazı insanlar = some people
• bazıları = some of them / some people

So you could also say:

• Bazıları küçük hatalara gülüyor. = Some of them laugh at small mistakes.

Because in Turkish, when the subject is already clearly plural and stated openly, the verb often stays in the third person singular form.

So this is very natural:

• Bazı insanlar küçük hatalara gülüyor.

You may also hear gülüyorlar, but it is often unnecessary when insanlar already tells you the subject is plural.

A useful contrast:

• Gülüyor. = he/she is laughing
• Gülüyorlar. = they are laughing

But when the subject is stated:

• İnsanlar gülüyor. = People are laughing

That is completely normal.

Good question. The Turkish -yor form often covers both:

• something happening right now
• something happening in a present or ongoing pattern

So gülüyor can mean:

• is laughing
• laughs
• is in the habit of laughing

depending on context.

In this sentence, it can sound like a general present observation:
Some people laugh at small mistakes.

If you wanted a more timeless or general statement, Turkish could also use the aorist:

• Bazı insanlar küçük hatalara güler.

That sounds a bit more like as a general rule, some people laugh at small mistakes.

The dictionary form is gülmek = to laugh / to smile.

To form gülüyor:

• verb stem: gül-
• present continuous ending: -üyor

So:

gül + üyor → gülüyor

This means is laughing / laughs.

Because Turkish often uses case endings where English uses prepositions.

English:

• laugh at mistakes

Turkish:

• hatalara gülmek

Here, -a on hatalara carries the meaning that English expresses with at.

So there is no missing word. The meaning is already built into the noun ending.

Not completely. Turkish word order is flexible, but the most neutral order usually puts the verb at the end.

This sentence has a natural neutral order:

• Bazı insanlar küçük hatalara gülüyor.

You could move parts around for emphasis, for example:

• Küçük hatalara bazı insanlar gülüyor.

That puts more focus on küçük hatalara.

So the verb usually stays last, but other parts can move depending on emphasis.

Sometimes yes, because gülmek can mean both laugh and smile, depending on context.

But in this sentence, laugh at small mistakes is the more natural reading, because hatalara gülmek usually suggests reacting to mistakes with laughter.

If the context were softer or kinder, English might translate it as smile at small mistakes.

They follow vowel harmony.

For hatalara:

• hata has the vowel a, a back vowel
• so the plural is -lar, not -ler
• the dative is -a, not -e

So: hata → hatalar → hatalara

For gülüyor:

• the last vowel in gül- is ü
• the -yor form uses a vowel that harmonizes with the stem
• so you get -üyor

So: gül- → gülüyor

You do not need to memorize every step perfectly at first, but it helps to notice that Turkish endings change shape to match the vowels in the word.