Write what the app knows.

Imagine you’ve just sent money. The app says Transfer berhasil. You close it and tell the person on the other end that the money is there. If the transfer is still processing, that little word berhasil has put you in the position of repeating a promise the app couldn’t make.

I’d write Transfer sedang diproses. Before trying to make the message sound friendlier, I’d ask what the app knows at that moment and what the person can do next. If there’s a useful next step, tell them. If all they can do is wait, say so.

This is the kind of distinction I want an AI copy checker to catch. A tone guide might tell it to sound reassuring. A better rule would name the product state and spell out when words like berhasil are accurate. Then a writer can review the result against something more concrete than whether it sounds right.