You buy (Selection and erection of wiring systems) in English PDF. You look up Table 52-2 (installation methods). The English translation correctly identifies "Method C" (clipped direct) versus "Method B" (in conduit). You then cross-reference with VDE 0100-430 for thermal constraints. Without the English version, your team would be guessing — a dangerous and non-compliant approach.
A common frustration is that the official, binding version of is published in German by the VDE Verlag (DKE – German Commission for Electrical Engineering). While the content is largely harmonized with IEC 60364, national deviations („Nationale Abweichungen“) exist. din vde 0100 english pdf