Luxembourgian is an adjective used to refer to people, things or customs from Luxembourg. However, there are many synonyms that can be used interchangeably. For instance, the term Luxembourgish can be used to describe any item from this country. It may also be used to refer to any person with Luxembourg nationality. Other synonyms include Luxembourger, which refers to people from Luxembourg, and Luxembourgic, which is another term that can be used to describe the people, language, culture, or anything else that has roots in the country. In summary, there are numerous ways to refer to people and things that are associated with Luxembourg, depending on the context and preference of the speaker.