ContactAttic 1.1.0 and later includes every language below and opens in your Windows language the first time you run it. A language pack is for a language that is not built in yet, or for a newer translation before the next update. A pack is one small text file. ContactAttic never goes online to fetch one: you download it here and install it from inside the app.
Open the Language screen: in ContactAttic, click the globe button at the top right of the window. The screen has three numbered buttons, and the steps below carry the same numbers, so they can be followed even while the app is still in English.
Need a language that is not listed? Download its pack from the address above with your browser, then install it here. ContactAttic itself never goes online.
A pack can never break the app. Any phrase a pack does not cover simply shows in English, so a pack from today keeps working with next year’s ContactAttic, and a newer pack works in an older ContactAttic. Packs need ContactAttic 1.1.0 or later, the first version with the globe button.
ContactAttic’s promise is that nothing leaves your computer and nothing comes in behind your back. Fetching language files from the internet would mean the app talks to a server, and we would rather it never did. So the pack is a file you download in your browser, exactly like the installer, and the app only ever reads it from disk. A pack can also travel by USB stick or email to a computer that is kept offline.
A pack is a readable text file with one line per phrase, so adding a language is a translation job, not a programming job. If you would like ContactAttic in a language that is not listed, or you spot a phrase that could be said better, write to hello@ContactAttic.com.