Source of translated BIM-classifications?

The BIM-Lisp-API shows me the classification in English:

(bim:get-all-usedclassifications)
("Stair" "Roof" "Slab" "Door" "Window" "Wall")

The BIM-CST (structure) shows me the strings in German:
Treppe / Dach / Platte ....

Where does the translation comes from? Can it be used from Lisp?

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