Translation of Salzsäure

I arrived there but could not find a hotel immediately, so that I took my luggage with me. I know that this is very provocative to thiefs. One should not walk on the street with a big backpack.
When we contacted you, our trainer was indeed for students only. We made some upgrades since then. Our site is now a vocabulary platform, because we support the creation of lessons by teachers and sharing.
We shared a cabin with an elderly couple from Spain. They started blablaing about Spain, about their corrupt government and about their civil war. They should not work in PR, advertisement or sales.