Language Learning Disscussion

find the core of a language, for example, 100 most frequent words. Then, use them to express what ever you want.
Some stage could be specified:

1. You are the only one in the world. You live in a single room and can not go out.
2. Another one live in your room.
3. You two can get out of the room.
4. You two meet other group of people.