This is the 50th most frequent Swedish word.
svenska
"Swedish" - the language of Sweden.
Here, 'svenska' is used as the noun referring to the Swedish language.
Jag älskar att tala svenska.
I love speaking Swedish.
In this case, 'svenska' is used as a noun signifying a Swedish woman (a person of Swedish nationality).
Hon är svenska och kommer från Stockholm.
She is Swedish and comes from Stockholm.
Here, 'svenska' refers to the Swedish language as a subject of study.