Breakdown of Sovellus henkilöityy sinulle, kun käytät sitä.
se
it / he / she (of a person) / that
sinä
you
kun
when (conjunction)
käyttää
to use
Questions & Answers about Sovellus henkilöityy sinulle, kun käytät sitä.
How is the verb henkilöityy formed from the word for person?
It is built from the noun henkilö (person). By adding the automative suffix -öityä, you get henkilöityä, which indicates a process happening on its own: "to become personalized" or "to personify". In this sentence, it shows the app is automatically adapting to you.
If henkilöityä means the app personalizes itself, how would I say that I am the one personalizing the app?
You would use the active, causative counterpart henkilöidä (to personalize). For example, minä henkilöin sovelluksen means "I personalize the application". The -öityä suffix specifically marks that the subject (the app) is undergoing the change by itself.
Why is sinulle in the allative case (the -lle ending)?
The allative case often translates to "to" or "for". With verbs of process or change like henkilöityä, using the allative indicates who the change is directed at or who benefits from it. The app becomes personalized for you.
Just as a refresher, why must we use sitä instead of sen at the end of the sentence?
The pronoun se (it) refers back to sovellus. It is in the partitive case (sitä) because the verb käyttää (to use) is a partitive verb. Using an application is considered an ongoing, unbounded action, so its object must be in the partitive.