not all patterns are automatically available in all languages.It always depends on whether the individual author of that pattern is able to provide it in several languages - there's no computer translating it automatically.
Generally, a good indicator is the language of the description text itself - if that is in English, then the pattern should be as well. If not, then chances are the pattern isn't either. Please contact the author of the pattern you are looking for and ask for a translation into English.
You can write a message by clicking on the contact button in the author's store.