Rationalise localization

[Artoria2e5]

Some users reports say that Maskbook is being used in Hong Kong too. Looks like we can't just settle with a single zh: we need to add some subdivisions. While we are at it, we should also rationalize our localisation system.

• Use a proper library that has:
  • Plurals
  • Grammatical Gender
• Put it on a platform with Git hooks

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I recommend Gettext/Jed if we want to put the thing on some translation platform immediately; i18next is sort of decent at that too. If we want something really good and powerful, however, I strongly recommend using MessageFormat. Few platforms support it for now, but Weblate (WeblateOrg/weblate#2967) might do soon. There's some precedence of its adoption in the JS community by Angular folks, so we aren't doing anything crazy here.

I don't really care about what platform we use, although again I am strongly leaning Weblate. If we are using Crowdin, however, be sure to review everything and don't let these damned stale votes decide what strings to use.

PS: don't change the spelling mix

[neruthes]

Looks like we will do this in 2020 Q2.

[Artoria2e5]

Could be earlier if I ingest enough nootropics and plumb through the translate-toolkit stuff. I mean, I can do a non-weblate thing first...

[Jack-Works]

hey what about this lib @Artoria2e5 https://github.com/skolmer/es2015-i18n-tag