One of the uses of sa in Demlutu is marking the topic of the sentence, which is mandatory in almost all types sentences. It comes after the word or constituent that is considered the topic. When the topic has more than one word, it is normal to add a comma.
Temporal and location expressions can also be topicalized, but any prepositions that accompany them will be deleted.
yak sa turns a constituent that comes before it into a noun, so that it can be used as the topic, direct object, subject, and many other syntactic functions that nouns can have.
The particle ya can be translated to English as that, who, and work as relative pronouns. They can also add additional information to the noun (akin to a dash in English).
The most common method to negate a sentence in Demlutu is adding non before the verb. It sometimes gets reduced to n’, especially in colloquial speech.