New project: Routing website "Look and Listen Map"

Yes, I have read the "New Project" page.

We will use Java. As the project realization has not started yet, we will be able to handle grammar issues. Are there any hints how to implement the grammar thing? Libraries? Instructions?

When I have an English source text and English does not differ between addressing s.o. formally and informally, is there a chance to add a remark for that to get the correct or all translations?

We will add the texts in English then and immediately do the translation to German by ourselves.

As a general rule, avoid building sentences from pieces as much as possible. We have a basic support for (in)formal addressing, it could be better though.