When the acquired culture traits are mixed with the original traits to form a blend of culture traits, this is called

syncretism
semantics
semiology
none of the above

Syncretism

Explanation:

Let's take a look at the meaning of the different possible answers:

Syncretism  : That's the merging of different cultural and religious aspects of different cultures into one, ideally blended in some way.  Unlike assimilation that is to eradicate the minority without keeping any aspect of it.

Semantics : Is more a philosophical concept of trying to find the meaning of words mostly, and study the languages, human or computer languages.

Semiology : That's the study of the signs, so that's not related to the question either.