Sorry for fixing two things in one commit.
First fixed bug is single offer and / or single price.
Those lead to exception / fatal error and are now handled.
Second fixed bug is wrong multi language handling.
Instead of using supported languages from entity (which does not exist
and was miss interpreted) we use configured system languages.
Each record is inserted with default language.
Also tourist attractions are inserted for all other languages.
They are only inserted if they have a title for that language.
