APP: Language routing to default browser language for new users

[laurensgroeneveld]

We noticed while testing the RelatedContent component in #174 that the appLanguageIdAsRef defaults to an empty string. This leads to unexpected behaviour when fetching the posts, as it will check for the current language, which doesn't exist.

The workaround for this is to set it manually, but this feels errorprone and a gotcha that people will run into in the future. Should we rather default to lang-eng for the language?

And it might be good to check this in the browser. Does it correctly default to English there for people that have never opened the site?

[ivanslabbert]

Language is not routing to English for new users. It seems to route to the newest added language (Chichewa in this case)

[ivanslabbert]

Some reading and ideas on setting the language: https://dev.to/bitdweller/stop-setting-the-language-of-your-website-based-on-my-location-31h0

[ivanslabbert]

Discussed during the standup meeting:

• Use 2-letter language codes
• use navigator.languages || navigator.userLanguages to get the list of browser languages and set the app language to the first match (if not already user-selected). If none of the available app languages are available, set it to the default language (see next point)
• Add a default selection in the language editor & DTO. When setting a language as default, other languages set as default should be reset to non-default.
• Set English as the default language in the seeding docs