Warn about missing translations

[jackcmeyer]

🚀 Feature Proposal

I would like the application to warn about missing translations when starting the application or running tests.

A preferable solution would be to have a library that does this for us, which could mean switching internationalization libraries.

However, as a fallback, a custom script that runs as part of yarn start or yarn test should work as well.

Motivation

Translations are very hard to manage and they get out of sync very quickly.

[martimfj]

Hey Jack!

I agree, I`ve just added a few of the missing translations. A script that compares the english translation files to the others (languages) and adds a default, would be nice too.

[fox1t]

I agree that might be helpful have a script that checks the status of translations file. We can run it on CI/CD in a non-blocking fashion: we can display a warning.

[marcosvega91]

Hi guys I have added a new command to check missing translations comparing every language with the english one.
In the future I think that you could integrate an external service like Crowdin.
The script could:

1. Send english translations to service
2. Download translations for all languages from the service
3. Update missing translations in locals folder

I remember that Crowdin is free for opensource project
Docusaurus uses this service