There are two activitie-types: skate-skiing and cross country skiing
Both are translated to "Langlaufen" in german.
As a user with german language I am not able to differ between them. We use for example "Langlauf Klassisch" and "Lauglauf Skating".
As I do "nordic cross skating" I would like to use one of these aktivity-typs (skate-skiing) because it is the closest sport.