This paper discusses the roles and challenges of the national language, which is Malay as a language in
uniting the various ethnic groups in Sabah. On September 16, 1963, the Federation of Malaysia was
officially declared which comprised of the Malay States, Singapore, Sabah and Sarawak. In line with
that, the special provisions on the national language in Sabah are contained in Article 161 of the
national constitution. Although the provision of the constitution clarify that Sabah was given a 10-year
period to use Malay and English as the official languages but later on September 16, 1973 the Malay language was declared the sole official language for the state of Sabah. Hence, various efforts have
been made by the government to ensure the national language can play its role as a language that can
unite the various ethnic groups in Sabah. However, ethnic diversity with their own ethnic mother
tongue languages has resulted in the Malay language as a national language as well as the language of
unity to face many challenges. Therefore, the discussion in this paper is focused on policies undertaken
by the government to strengthen the national language in various fields in Sabah and the challenges
faced by the national language to foster unity among the various ethnic communities in the state. This
study was conducted using a qualitative analysis approach and used archive study methods as well as
library study to obtain research information sources. This study will produce an analysis that can be
used as a reference to improve or formulate policies particularly in matters that benefit in strengthening
the multi-ethnic communities in Sabah.