Yedek düğme kumaş türüne göre seçildi.

Yedek means spare, extra, or replacement.
Düğme means button.

So yedek düğme means spare button or replacement button.

In Turkish, adjectives come before the noun, just like in English, so:

• yedek düğme = spare button
• not düğme yedek

Turkish does not have definite and indefinite articles like English the and a/an.

So yedek düğme can mean:

• a spare button
• the spare button

Which one sounds best depends on context. Turkish often leaves that unstated unless something else makes it clear.

...-e göre means according to ..., based on ..., or depending on ....

So:

• kumaş = fabric, cloth
• türü = type
• kumaş türüne göre = according to the fabric type / based on the type of fabric

This phrase tells us the basis for the choice.

Because kumaş türü is a noun compound meaning fabric type or type of fabric.

Breakdown:

• kumaş = fabric
• tür = type
• kumaş türü = fabric type

In this kind of Turkish noun compound, the second noun usually takes a possessive-looking ending:

• tür → türü

Then, because göre requires the dative case, we add -e:

• türü
  • -ne → türüne

The n is a buffer consonant that appears before the case ending.

So:

• kumaş türü = fabric type
• kumaş türüne göre = according to the fabric type

Yes. Göre normally goes with a noun in the dative case.

Examples:

• bana göre = according to me / in my opinion
• kurallara göre = according to the rules
• hava durumuna göre = according to the weather forecast
• kumaş türüne göre = according to the fabric type

So if you see göre, it is a good habit to expect the previous word to have a dative ending.

Seçildi is in the simple past tense and also in the passive voice.

Breakdown:

• seç- = choose, select
• -il- = passive marker
• -di = past tense

So seçildi means:

• was chosen
• was selected

Because the sentence focuses on the button, not on the person who did the choosing.

• Active: Birisi yedek düğmeyi kumaş türüne göre seçti.
  = Someone chose the spare button according to the fabric type.

• Passive: Yedek düğme kumaş türüne göre seçildi.
  = The spare button was chosen according to the fabric type.

Turkish uses the passive very naturally when the doer is unknown, unimportant, or simply not mentioned.

The order is:

• Yedek düğme = subject/topic
• kumaş türüne göre = adverbial phrase (according to the fabric type)
• seçildi = verb

So the structure is basically:

Subject + phrase + verb

This is very normal in Turkish, since Turkish usually puts the verb at the end.

A very literal English-style gloss would be:

Spare button according to the fabric type was selected.

Yes, Turkish word order is flexible, but moving things changes emphasis.

For example:

• Yedek düğme kumaş türüne göre seçildi.
  Neutral and natural.

• Kumaş türüne göre yedek düğme seçildi.
  Puts more emphasis on according to the fabric type.

In many cases, the final position before the verb can receive special focus, but the most natural version depends on context.

Yes, that is a very good way to understand it.

Turkish often uses noun compounds where English uses of:

• kumaş türü = type of fabric
• literally something like fabric type

This is very common in Turkish:

• araba kapısı = car door
• okul müdürü = school principal
• gömlek rengi = shirt color

So kumaş türü fits a very common pattern.

Because it is not the direct object here; it is the grammatical subject of the passive sentence.

Compare:

• Terzi yedek düğmeyi seçti.
  = The tailor chose the spare button.
  Here yedek düğmeyi is the direct object, so it has the accusative -yi.

• Yedek düğme seçildi.
  = The spare button was chosen.
  Here yedek düğme is the subject of the passive sentence, so there is no accusative ending.

You could say:

• Terzi yedek düğmeyi kumaş türüne göre seçti.
  = The tailor chose the spare button according to the fabric type.

or more generally:

• Biri yedek düğmeyi kumaş türüne göre seçti.
  = Someone chose the spare button according to the fabric type.

Notice the change:

• passive subject: yedek düğme
• active object: yedek düğmeyi

Not exactly.

Göre means according to, based on, or in line with. It shows a standard, criterion, or reference point.

So kumaş türüne göre seçildi means the button was selected with the fabric type as the basis.

That is different from because of, which usually expresses cause:

• kumaş türüne göre = according to the fabric type
• kumaş türü yüzünden = because of the fabric type

So here the idea is not simple cause, but selection based on a criterion.

Roughly:

• düğme ≈ dew-meh, but with Turkish sounds

A few notes:

• ü is like the vowel in German über or French tu
• ğ in modern Turkish often lengthens or softens the surrounding vowel rather than being strongly pronounced
• So düğme is often heard something like düü-me

You do not need to force a hard g sound there.

Yes, the verb seçmek can mean to choose, to select, or to elect, depending on context.

So seçildi can mean:

• was selected
• was chosen
• was elected

But in this sentence, because we are talking about a spare button, the meaning is clearly was selected/chosen, not was elected.

Yes, it is natural and grammatical.

It sounds like something you might see in a clothing, tailoring, textile, or manufacturing context, where a spare button is selected to match or suit the type of fabric.

It is concise and formal-neutral in style.