Error by multiethnic ("relative to an ethnic group") .
This is related to housing people of different ethnicities in case of a country, it would be the United States or Mexico since according to the consensus of each country they receive about 2. 000 people a year of different ethnicities.
The correct term is multi-ethnic. It means that it contains or includes many ethnic groups or races. It also refers to having many tribal groups from different roots, origins or provenance.
It is the coexistence of different cultures in a society or country...