Could it be the Tswana name for English? But why single out just that language (and whencever comes Anglit)?

http://www.google.com/search?hl=en&ie=ISO-8859-1&q=sekgoa&btnG=Google+Search


~~~~~
Edit:
while googling sekgoa, I ran across these two outfits, related to each other:

http://www.ethnologue.com/

http://www.sil.org/


SIL jingles a tiny bell in the deep recesses: is this not the Summer Institute of Linguistics, which has had a checkered past?