TeX: Enable to skip LaTeX environment

[koppor]

(This is similar to #664 - this issue here is about a concrete LaTeX feature, whereas #664 proposed a "hack" to have aspell ingore certain thigns)

Originally posted by Claus ATzenbeck at https://mail.gnu.org/archive/html/aspell-user/2004-05/msg00000.html

aspell cannot skip complete LaTeX enviornments (while it can skip commands)

This is my case:

        Here I have a lot of English stuff
        Then I have some German text:

        \begin{otherlanguage}{german}
          Hier beginnt der deutsche Text.
        \end{otherlanguage}

        Here some more English text...

Wish: Tell Aspell not to check the otherlanguage environment, at least not using the English version?