I would apply anywhere, regardless of the language, so long as the home owners were aware of my ability (or lack there of) and were ok with it. That being said, we mostly travel in UK, France, Italy, and Spain, so the languages are somewhat familiar to me and I can usually get by.
I can speak French reasonably well and I always refresh before we travel. When I’m going to be in Italy or Spain or Germany or wherever, I work on Duolingo in that language for 5-6 months before we go to make sure I have a basic understanding of the structure and can read simple instructions and say enough basic phrases to get by.
I find google translate and phrase books to be very helpful when I can’t make myself understood. It’s very rare that I’ve been completely stuck in a situation where it was important to make myself understood though, even when I had to go pick up medication at the vet for a lamb I was looking after,
Once in Spain, my husband had to see a doctor. I looked up all the words to describe his symptoms and she and I wrote sentences into our phones to translate the rest. It worked out great!