Basically, language is not the principal problem in doing international SEO. Nothing stops us from traveling to countries where we can’t speak the language.
If you are a freelancer and don’t have much in terms of resources
for a consultant, but are ready to conquer new horizons, hire at least an experienced copywriter from the country where you are going to sell your services or products. He or she will know the customs and the current slang and idiomatic phrases.