The research aimed to find out the Javanese language interference in the form
of morphology and syntax found in several narrative essays at the seventh grade
students of SMP Ma'arif Karanggedang. The study aimed to provide information
about the Javanese language especially on morphological and syntactic interference
with Indonesian in narrative essays of seventh grade students of SMP Ma'arif
Karanggedang. The data were in Indonesian sentences containing Javanese
interference, both containing morphological interference and syntactic interference,
in narrative essays of the students. The source of the research data is narrative essays
of seventh grade students of SMP Ma'arif Karanggedang. The data were collected by
reading method namely reading students' narrative essays and identifying linguistic
forms containing interference. The data analysis phase used the intralingual
equivalent method and then differential comparison (HBB) technique. The
presentation stage of the data in an informal way was to describe the results of the
research that has been obtained. Based on the results of the analysis, it can be
concluded that the Javanese language morphological and syntactic interference
contained in the students' narrative essays be classified into several groups.
Morphological interference in the Javanese language consists of two types, namely (1)
morphological interference in the form of affixation and (2) morphological
interference in the form of reduplication, while syntactic interference consists of five
types, namely (1) interference type of construction phrase, (2) interference type of
clause structure, (3) interference of preposition use , (4) interference of conjunction
use, and (5) interference of sentence structure.