abstruse in german abstruse in danish abstruse in spanish abstruse in french abstruse in italian abstruse in norwegian abstruse in russian abstruse in swedish abstruse in belarusian abstruse in estonian abstruse in finnish abstruse in greek abstruse in croatian abstruse in hungarian abstruse in lithuanian abstruse in portuguese abstruse in romanian abstruse in ukrainian abstruse in polish abstruse in albanian