Not only tech... I live close to the French border. My wife asked me to go to some criminal dinner event thing in France, and all the leaflets and the website were English. Great! Checking out the details, a small remark in a table with the dates and such catches my eye "Language: French". Well, maybe that's the French date,... Nope, that's for all scheduled events. Kthxbye. At least we were not surprised on site, because my French c'est no bene.
People spent more time reading your job offer if is explained in their own language. Less friction, more eyeball time, that is what you want if you are a recruiter.