Correct spelling, explanation: the word Brazilian originates from the noun Brazil (a country in South America). As you can see, it’s a derivative. Being so, it consists of two parts: the root (Brazil) and the suffix (-ian). This suffix is often used to create adjectives of belonging (meaning from, related to, or like). It comes from Latin -iānus. Remember that the only correct version of this word is Brazilian, not Brazillian.

Definition of Brazilian:
1. adjective, relating to Brazil
My Brazilian friends really want to come to Poland.
Her Brazilian ring was recently stolen.
2. noun, a native or inhabitant of Brazil
I recently met two Brazilians at a party. They were really nice.
I would like to talk to a Brazilian about their cuisine.

Collocations with Brazilian:
Some most commonly used collocations include: Brazilian culture and Brazilian food.
I find Brazilian culture very interesting, especially literature.
Let’s go for Brazilian food today at this newly opened restaurant.

Incorrect spelling, explanation: the word Brazillian doesn’t exist in any dictionary. The right form, Brazilian, is a derivative of the noun Brazil. It was made by adding a specific suffix to the end of the root. This suffix is -ian, not -lian, so putting the double -l consonant in this word doesn’t make any sense. The only correct version is Brazilian and Brazillian is just a misspelling.

Incorrect spelling

Incorrect spelling