\ProvideSemanticEnv{idea}[purpleblock]{Idea}[%
    numbered=no,style=definition
  ]{idea}{ideas}{Idea}{Ideas}
\ProvideTranslation{swedish}{idea}{idé}
\ProvideTranslation{swedish}{ideas}{idéerna}
\ProvideTranslation{swedish}{Idea}{Idé}
\ProvideTranslation{swedish}{Ideas}{Idéerna}