Support for automated translation tools

[alexander-schranz]

Currently the documentation is only in English. We already did got request to translate it to other languages. But as we see PHP is failing with it and Symfony is not even trying it we should also not give a try to keep translated versions of docs up2date. Instead we should make sure that our docs works great with "automated translation" tools. The google chrome browser already ships with such a tool. Still it need to be done some work on our side as we need to define some "values" as not translateable. Mostly it will be code by adding ``backticks`` around.

Example currently failing auto translate for text_line and other field type in the list:

We should have a deeper look at all the pages maybe we can tackle something in the CI to show diff also in "translated" version for pull requests via a bot.