Je was op zoek naar: monolingualism (Engels - Swahili)

this is why our language of instruction policy needs to promote multilingualism, and not monolingualism.
hii ndiyo sababu sera yetu ya lugha ya kufundishia inatakiwa kukuza matumizi ya lugha zaidi ya moja, na sio kutumia lugha moja tu.

monolingualism encourages insularity, a restricted worldview in which the only knowledge available to one is from one linguistic source.
kuzungumza lugha moja kunasababisha kuwa na mtazamo finyu, kuyatazama mambo kwa uelewa mdogo kwa sababu ya ukweli kwamba maarifa yote ayanayopatikana yanakuwa kwenye lugha moja tu.