This is the 6466th most frequent Japanese word.
スワヒリ
Swahili.
In this sentence, スワヒリ語 refers to the language itself, denoting that Swahili is recognized as a linguistic system used by people.
スワヒリ語はアフリカで話されている言語です。
Swahili is a language spoken in Africa.
Here, スワヒリ refers not directly to the language but to the culture associated with people who speak Swahili or the region where Swahili is prominent.
私はスワヒリの文化に興味があります。
I am interested in Swahili culture.
This usage focuses on the practical application of the language, implying communication in Swahili.