This is the 975th most frequent Finnish word.
ranskassa
"Ranskassa" means "in France" in English.
The word "Ranskassa" here indicates the location where the subject (I) lived, showing it as a place of residence.
Minä asuin kerran Ranskassa.
I once lived in France.
Here, "Ranskassa" shows the location where the subject studied the language called French, providing the geographic context of the learning.
Opiskelin ranskaa Ranskassa yliopistossa.
I studied French in France at the university.
In this sentence, "Ranskassa" specifies the location of the friend who sent the letter, indicating their whereabouts.