Translation of moderieren

The citizens actually welcomed the shrinking of the population because they thought that the fewer people there are the more place and wealth the rest could share as more resources are available.
How could I get better in Spanish if I had to eat by myself. Impossible. The next days we always ate together and sat around the table for hours discussing politics and the lives we were living.
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.