This is the 3000th most frequent Japanese word.
バングラデシュ
Bangladesh (a country in South Asia).
In this sentence, 'バングラデシュ' acts as a proper noun referring to the name of the country Bangladesh. It's being used as the subject of the sentence.
バングラデシュは南アジアに位置する国です。
Bangladesh is a country located in South Asia.
Here, 'バングラデシュ' functions as a descriptive reference forming the possessive term 'バングラデシュの', which identifies the nationality as Bangladeshi.
彼のパスポートを見ると、彼がバングラデシュの国籍なのがわかりました。
Looking at his passport, I understood that he has Bangladeshi nationality.
In this case, 'バングラデシュ' serves as a modifier in 'バングラデシュ料理', which specifies cuisine originating from Bangladesh.