What has happened to the word " fire" ?

Hola Brian

This is the sentence you are referring to:

In Spanish, to say "to light the fire in the fireplace" we use a very short sentence which implies all that. That is "encender la chimenea"; it is as if we are saying literally "to light the fireplace" which in English would sound odd, but not in Spanish. This is why we don't have the word "fire" in the translation.

I hope this helped.

Saludos

Inma