The laws on this question are vague, but technically it is legal. The police might not take it so softly because it is a concealed weapon, but it is legal.
Typically, no.
No
It is either pure cane sugar, or it is a white substance that is an illegal drug.
negative.
no they can not
yes
no no no no no no no no no no no no no no lololololololololollololollo
It is banned in those countries because it is a canceled weapon. Both Germany and United Kingdom have strict gun laws than the U.S. Also they have strict laws on cancel weapons so cane swords would be banned.
It is entirely possible to own a collection of swords, so long as they are used for decoration, collection, or recreation. - Decoration being a purely aesthetic application of swords in the home - Collection being a hobby-style collecting of swords as per historical interest - Recreation being for usage in activities such as battle re-enactment or Historical European Martial Arts (or equivalent) Purchasing a sharp weapon without good intention, especially any blades less than 100 years old can be illegal, unless proof of intent can be evidenced. Certain blades are illegal to import and purchase except in very restricted circumstances, particularly cane swords and Katanas/Wakizashis. Cane swords are illegal because they are disguisable and Japanese style blades are illegal because their deadliness is exaggerated and therefore they are a common line of purchase for belligerent activities. If you are planning on purchasing a sword, figure out which one of the three categories you belong to. As a final note, if you do end up with a blade that is inferior to its description, you could be liable to a full refund under the Trade Descriptions Act (UK only). (This answer is based on UK law and my experience in Historical European Martial Arts)
No
Yes
No they are not.