I was surprised to find the word "to abseil" being known in the UK. It clearly is of German origin and used literally (eg. to descend a mountain on a rope = Seil) as well as figuratively (to sneak out of an unpleasant situation).
There are also a lot of „expedition“ related words (e.g. Rucksack) that made their way to Japanese.
IIRC the Germans did a lot of expeditions/Mountaineering in the Himalaya, etc. and I assume that this is how these words transferred to English/Japanese.
"HMS carabiner" is also common amongst anglophone climbers (for the "Halbmastwurfsicherung" knot you might use as an alternative to your sticht plate).