alt Hacker NewsLooks like it's mostly strings, probably due to localization. They should consider compressing each localization/language, and decompressing the needed bundle on first startup (or language change). Even better: Download the language bundle when needed.
Well, that's a question for OS level. If the OS doesn't require the user to download the language and so language-switching to a new language is doable as an offline operation, I could see it being frustrating that switching to a new language must be done online.
So compression/deduplication is probably the better option. Rather than storing as 1 zip per language, though, you'd probably want a compression format that also eliminates duplication that may occur between languages if you're storing all languages compressed on the system. That means you'd need compression to handle the entire language complex being in one massive compressed blob and you'd just extract out the languages you needed. I assume there are some forms of zipping that do this better than others.