If we only want to stay there for a few weeks, we needn't study Spanish. We only need to learn some important phrases.

http://www.tripadvisor.com/ShowTopic-g294266-i977-k3082139-Do_we_need_to_speak_Spanish_we_only_know_English-Argentina.html

There are a few people who can understand a little English.

We should learn a little Spanish. Just a little.