The primary language of the mass was Latin.
Primary language is the original language one spoke or wrote the material in. Secondary language is translated from the primary language afterward.
The primary language spoken in London, England is English
No, Portugal does not speak Spanish as its primary language. The primary language spoken in Portugal is Portuguese.
The primary language spoken in Sevilla is Spanish.
Jerusalem
Israel
Rabbis and cantors
The primary language spoken in Marseille is French.
The primary language spoken in Amsterdam is Dutch.
The primary language spoken in Bratislava is Slovak.
According to several researches it is still English as the primary language.