...when it strikes Lutherans of America as a bit odd to speak or think of fasting, much of this is sadly due to something left behind in the switch into the English language. In the first Agenda of the Missouri Synod, the readings for this particular Sunday are introduced:
Am ersten Sonntage in der Fasten, genannt Invocavit.
On the first Sunday in the Fast, called Invocavit.
And so on throughout the season.
The season itself is called in German: "Fastenzeit" - fasting time. So to the members of the early Missouri Synod, who were well-versed in German, the very word used for "Lent" simply was "Fast." Thus to say that Lutherans observe Lent, auf Deutsch, is to say that Lutherans observe the Fast.