Why sheng could be limiting local musicians

I have an opinion; it's about music and sheng. I usually have a problem with sheng slang. It is a local and under-developed language born in Nairobi ghettos in the late 1990s or early 2000s. A language that is commonly used by local musicians such as Nameless, Willy Paul, Jua Cali, Wahu, Wyre, etc. To me, I'd rather speak in fluent English, Swahili, or Kikuyu rather than sheng.

If you follow bongo flava music, I'm sure you know about artists like Diamond Platnumz, Harmonize, and Alikiba from Tanzania. There was a time Diamond did collabos with international artistes such as Rick Ross, Neyo, and Morgan Heritage, among others. I was asking myself this question, "Why is it that most Kenyan musicians can't do a collabo with these international stars?"