Learn Turkish: Düğün organizasyonu için kimler geliyor? - Who all are coming for the wedding organization?

In Turkish, adding the plural suffix -ler to a question word like kim (who) shows that you expect the answer to be a list of multiple people. If you just asked kim, you wouldn't necessarily be expecting more than one person. English often translates this as "who all" or "which people".

Since kimler is plural, why is the verb geliyor in the singular form instead of geliyorlar?

When a plural human subject is explicitly stated in the sentence (like kimler), making the verb plural is completely optional in Turkish. It is very common and natural to use the singular verb geliyor here. You could say geliyorlar, but it's not strictly required.

Why is there a -u at the end of organizasyonu?

This is a noun compound marker. When linking two nouns where the first describes the second, Turkish adds a possessive suffix to the second noun. Here, düğün (wedding) categorizes organizasyon (organization), so the second word takes the -u suffix to lock them together as düğün organizasyonu (wedding organization).

Is organizasyon just a direct translation, or is it the natural word for event planning?