New translation module

[MichaelLangbein]

The current translation module is unbearable. Find or create a new one.

Examples of how own directive might look:

[innerHTML] = " key | translateKey "`

or

[innerHTML]="<h1> {{key}} </h1> <p> {{ key2 }} </p> | translateLiteral"

Second way seems more general.

Note that angular's own built in i18n becomes more and more the go to:
https://angular.io/guide/i18n
But it does not allow live switching. Requires two versions of the app to be deployed.

@eschoepfer : will do research if we can lose the live translation of the site and use angular's static i18n instead.