Translation of entschärfen

A bystander who watched the entire scene all the time decided to help me. He was an older man, around seventy, but nonetheless he went to the oldest of these kids and slapped him. The boy was sixteen.
I would not put the box on the front page, you have it in the menu. But, if you want to have links from within your main page, put regular links within the introduction text, directly to the Spanish page.
About multiple translations: We want students to memorize 'idioma' and 'lengua' as they are both very common. The best we could do is to place them in 2 different lessons, so that users learn them both.