To be more explicit, I think about a collection of "abstract" sentences which could be categorized in such a way that they would be easily identified in any language. For example, some typical phrases classified in question/location/movement-from/present would be: Where are you from?; D'où viens-tu ?; Woher kommst du ? ; ... and others in assertion/time-period/past could be: It was during the 1970s.; C'était dans les années 70.; Es war während der 1970er. The result would be a set of elementary sentences that could be learn by language learners to memorize key words or usual phrase structures in a foreign language or that could be a tool for interested people to compare how different languages express the same idea.
PS: I am not a professional linguist or anything related to this, so I hope the vocabulary/examples I used is not somewhat confusing for you...