Translation of fáctico in Spanish-English

There were no lights on the highway and hardly any cars, but quiet a few motorcycles and funnily pedestrians walking on the emergency lane. There was a tropical atmosphere in the air, I liked it.
We added context sentences for some of our predefined vocabulary lessons. Our language trainer now supports multiple answers as well, however in our predefined lessons we did not implement this option.
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.