That language plays a pivotal and integral role in making political processes participatory and inclusive, and socioeconomic development sustainable has been commonsensically presumed to be a well-established fact. Language is not simply a means of mutual communication, but also a potent tool for social inclusion and exclusion, resulting in having both a positive and negative social impact. In this sense the use of African languages in all social domains for making sure of the concretization of inclusive political participation and representation as well as sustainable socioeconomic development. Despite being considered to be an exemplary country that has pursued an active endoglosic language policy, Tanzania has an uphill task in facilitating participatory democracy and sustainable socioeconomic development by virtue of the ease of language understanding with which people can make them understood in everyday life. What is imperatively needed in making participatory democracy and sustainable socioeconomic development possible and feasible is a strong political will and its implementation. In tandem with a strong political will and its implementation in the conduct of national affairs, a ceaseless and concerted effort needs to be made with a view to capacitating Swahili to make a meaningful contribution to participatory democracy and sustainable socioeconomic development. Furthermore, corpus planning that refers to an institutional effort for creating standards for Swahili has to be done.

Abstract
1. Introduction
2. The inseparability of language and participatorydemocracy and sustainable socioeconomic development
    2.1. Language as a core component of participatory democracy andsustainable socioeconomic development
    2.2. The divide between the language used by those in the upperechelons of the society and the socially underprivileged
    2.3. Agency, voice and participation
3. Language situations in Africa since its decolonization
4. Tanzania as an exemplary nation of endoglossic languagepolicy
    4.1. Tanzania's endoglossic language policy
    4.2. The position of English in Tanzania
5. Some polemical issues surrounding Swahili
    5.1. Swahili from an Islamized language to a de-Islamized one
    5.2. Learning in Swahili as Social Deprivation and Exclusion
    5.3. Swahili as a killer language of other African languages?
6. Challenges ahead and ways forward
    6.1. Lexical expansion, elaboration and sophistication
    6.2. Intellectualization of Swahili
7. Conclusion
References

• Chul-Joon Yang(Hankuk University of Foreign Studies)