THE NEGATIVE IMPACT OF NIAS LANGUAGE INTERFERENCE IN LEARNING INDONESIAN LANGUAGE

Most of people in the world and also Indonesian speakers are bilingualism, who use two languages; Indonesian and mother tongue. Commonly, both languages influence one another, which finally create a new phenomenon of language called interference of language. Interference of language is a form of an impact of mother tongue towards second language, which creates an error in the second language. The error occurs because the mother tongue language and the second language have different structure and different way in using the language. In this research, the writer finds out that the ability of someone in mastering the second language will always be influenced by the mother tongue. As a real case for Nias speakers, they make mistakes and errors when they speak in Indonesian, especially in phonological and grammatical structure. The mistake occurs because phonological and grammatical in their mother tongue are still used in second language, thus it makes the second language invalid in the way of norm and rule. From the result of the research, it can be concluded that Nias speakers interfere Indonesian in their daily conversation. The interference can be existed as a form of the impact of mother tongue to second language. In this research, there are three interferences of Nias speakers that have been found by the writer. First, Nias speakers omit the final consonant of words when speaking in Indonesian, it is because in Li Niha there is no final consonant of words but only final vowel. Second, Nias speakers also create a redundancy when they are speaking Indonesian, it is because they are usually add some words in their speech in order to emphasize their statement. Third, Nias language and Indonesian language have different structure in arranging sentences. Based on that difference, Nias speakers oftentimes invert the words in sentences. So, the writer concluded that all of these aspects are the aspect which influences Nias speakers to interfere the second language.


INTRODUCTION
Most of Indonesian people are able to speak more than one language. It means that Indonesian people are bilingualism. Weinrich (1970: 64 -65) states that interference is a general problem that occurs in bilingualism. Therefore, some problems exist about mastering the languages. The ability for mastering the second language is often influenced by mother tongue of the speaker. This kind of case was called as an interference of languages. Interference of language appear because of people who lack of fluency. For mastering the second language a person will never be free from their first language, it means that the second language will be affected by the first language. This kind of interference case is experienced by people's mother tongue.
On the other hand, Lott (1983: 256) states that interference is also known as an error effect on the production of the language being learned. The effect can be on any aspects of language: grammar, vocabulary, accent, spelling and so on. It is most often discussed as a source of errors (negative transfer), although where the relevant feature of both languages is the same, it results in correct language production (positive transfer). The greater the differences between the two languages, the more negative the effects of interference are likely to be. It will inevitably occur in any situation where someone has not mastered a second language.

THEORETICAL FRAMEWORK
Bilingualism is a worldwide phenomenon. . This interference occurs because of the fact that /g/ never arises in the final position of Indonesian language words; so, /g/ is identified as /k/ in that position. In addition, he may replace /v/ with /p/, /f/ with /p/; he may not use a /p/ with aspiration. In Li Niha they will pronounce the words correctly and properly such as /kh/ and /z/: "akhir zaman" meanwhile in Indonesian speaker they don't mention /kh/ but it will be mention like /k/ "akir" and for the /z/ it will be mention like /j/ "jaman. This case is also brought when Nias speaker speak Indonesian, they will pronounce the words correctly. In the sentence above, the speaker omits the final consonant of words. The speaker omits final consonant "ng" for "sombo", "t" for "bange" and "n" for "bertema". The words should be "sombong" with final consonant of "ng", "banget" with final consonant of "t" and "berteman" with final consonant of "n". There is omission in the sentence above, the speaker omits final consonant "t" in "peli", "bange", and consonant "ng" in "ora". The words "peli", "bange", "ora" need a final consonant to avoid weird and awkward words. The good words should be "pelit", "banget", "orang" with final consonant "t" and "ng". In this case, Nias speakers are difficult to complete every final consonant in words because they get used to end words with a vowel in Li Niha (Nias language). At this point, they will omit words unconsciously and spontaneously in the time of speech. This is one of the influences of mother tongue to second language which is always brought in the second language and as the result interfere the second language.
Data 4: "Lebi banya ya kamu tolo" When Nias speakers speak in Indonesian, they will omit final consonant of the word. Just like in the sentence above, the speaker omits final consonant "h" in "lebi" word, "k" in "banya" word, "ng" in "ya" and "tolo" word. The good words should be "lebih" with final consonant of "h", "banyak" with final consonant of "k", and "yang", "tolong" with final consonant of "ng". So, the sentence should with a final consonant like "lebih banyak yang kamu tolong". To complete final consonant in every words, is a difficult thing for Nias speakers.
Data 5: "Kemari aku maka gorenga" In the sentence above definitely people will know if the speaker is Nias speaker because there is omission in words, like in the sentence above. The speaker omits final consonant "n" in "kemari", "maka", "gorenga" word. The good words should be "kemarin", "makan", "gorengan" with final consonant "n". For Nias speakers, it is not a big deal when they omit final consonant of words but nonetheless they want to avoid it. "Saya cenderu memakai kata upa" In the sentence above, the speaker omits final consonant "ng" in "cenderu" word and "h" in "upa" word. The correct word should be "cenderung" with final consonant "ng" and "upah" with final consonant "h". Then, the good sentence Data 10: "Kami masi butu tenaga kerja" In the time of speech, the speaker omits some final consonant in the words.
When the speaker says "masi butu", the speaker omits final consonant "h", the word should be "masih butuh". These mistakes always occur unintentional and it makes the conversation sounds awkward. Nias speakers tend to use additional information to clarify a sentence, but sometimes they create ineffective sentence due to waste of elements. In the sentence above, the speaker repeat the noun "ongko" (ongkos) and the verb "testing" all at once in a sentence and it makes redundant. The speaker is trying to make the sentence more complete by repeat the same words.
Instead, the speaker makes the sentence ineffective and sounds rambling. The word "ongko" (ongkos) and "testi" (testing) does not need to be repeated, because when there is noun followed by verb the sentence has become good form according to Nias speakers get used to do repetition in their speech or conversation.
In the sentence above, the speaker repeat verb "cari" and repeat "mau" word.
Actually, the word "cari and mau" does not need to be repeated twice or more in a sentence because it can cause redundancy.
Instead, the speaker repeats the same word five times and makes the sentence redundant. The sentence will be more effective and simple if the speaker put the word "cari and mau" one in a sentence. and then says "suda pusi saya" (sudah pusing), he repeats the subject "aku" and "saya" all at once in the sentence. After possessive pronoun "pikiraku", the speaker adds the subject "saya" at the end of the speech. Actually, in the sentence above no need to add the subject "saya" because possessive pronoun already put the subject inside the phrase "pikiraaku". Furthermore, the phrase "pikiraku" is not suitable either with subject "aku" because noun "pikira" (pikiran) does not belong to possessive pronoun. It is better if the speaker says "saya suda pusi" than says "pikiraku suda pusi (pikiranku sudah pusing", because the first phrase is more suitable than the second phrase. In the sentence above, the speaker does not realize if he already make a mistake by adding more than one subject of "aku and saya". It happens because the speaker wants to explain clearly about the subject condition, instead it becomes redundant.
This case, usually occur in Nias speakers while speak Indonesian because they like to explain something superfluous and add some unnecessary explanation in speech.
Moreover, in Li Niha (Nias language) they normally do repetition in their language like "maimai" or "candaan" in Indonesian language. Therefore, Nias speakers make a sentence redundant because they have been getting influences by their mother which ended up with redundancy and interfere Indonesian language.
Data 9: "aba dari mana aba" The sentence above is redundant. "Apalagi ora menjadi seora dokte" In the sentence above, the speaker creates redundancy in the time of speech.
The sentence becomes rambling when speaker repeated the noun "ora and seora" twice in the sentence. The noun "ora and seora (orangseorang)" is the same thing and does not need to be repeated or to explained. Furthermore, the phrase "apalagi ora (orang)" followed by phrase "menjadi seora ( "Aku tidak bisa"

Subject Predicate
Li Niha interfere Indonesian by putting the predicate first then followed by the subject.
As the result, Nias speakers will invert the words (according to Nias pattern) when they are speak in Indonesian.
To make a sentence in Li Niha should be predicate followed by object then followed adverb (predicateobjectadverb) as follow : "Tida bole kamu begitu" Predicate Object Adverb Meanwhile, to make a sentence in Indonesia should be object followed by predicate (objectpredicate) as follow : "Kamu tidak boleh begitu"

Object Predicate
The differences grammatical rule between Li Niha and Indonesian gives some difficulties towards Nias speakers.
As the result of this difference, Nias speakers invert the word and make the sentence ungrammatical according to Indonesian grammatical structure. The sentence may be understandable towards the listener but still the sentence is not in a good formation.

Conclusion
As discussed previously, interference of language is one of the speak error which is considered as the referring of damaging the system language.
Language interference is the effect of language learners on their production of the language they are learning, means that the first language of the speaker influences their second language. Through the data that has been found by the writer, it proves that Nias speakers have got negative impact or influence by their mother tongue, Li Niha (Nias language