Don’t forget to declare any stuff that might get trapped on your shoes. Iirc people have been jailed for having “marijuana traces” on them.
EDIT: not sure why people are voting down but this actually happened: https://www.npr.org/templates/story/story.php?storyId=18842015
It seems to me that not being able to speak other languages tells you something about the level of education and breadth of knowledge of a person or at least about their open mindedness or lack of thereof.