My first reaction was "Oh--a Border Collie who speaks Spanish!" From my two semesters of Spanish a couple of years ago and sporadic exposure to it from radio and TV around here, I know this says, "protect your lawn from invasive insects." Why would the dog care unless those insects were ticks or fleas? Part of guarding the house, I guess.
When I was in high school, I had a German teacher who owned a miniature Schnauzer. She was proud of him. Not only was he well-trained and obedient, he knew all the commands in English, French and German. He was a truly multi-lingual dog. When you think about it, why not?
Our Golden Retriever could even spell. When she was a puppy, we'd ask her if she wanted to go for a walk. Then we had to be careful when we said that if we didn't intend to take her for one and it just came up in conversation. Otherwise, she'd be nose to the front door, looking expectant. So we had to start spelling that word and a number of others: w-a-l-k, r-i-d-e, c-a-r, b-a-t-h.... Any of those would cause some kind of reaction, whether good or bad. The "bath" word would cause her to run and hide.