Ask questions or just talk about different languages. Since BrainKing is an international game site supporting many languages, this board can be kind of useful.
To me 'custom' is a very obsurb word. It has a few different meanings in the English language
1. practice followed by people of a particular group or region. 2. Duties or taxes imposed on imported and, less commonly, exported goods. 3.Made to order.
Then if you make the word 'customer' a person or business that purchases a commodity or service
English is a very difficult language to master I would think.