Linguistic Validity
At the end of the day, African Aviation does have one of the worst safety records in the world, and it could be argued that language and understanding might be a small factor in some of the pointless, stupid actions that occur in the skies above us here. So I think talking (in good grammatical, punctuated English of course) about this subject is entirely valid.
Besides which, Africa is also a true melting-pot of languages; everything from English, Portuguese, French, Spanish, Bantu, Swahili, Maasai, Pokot, Luo, Luhya, Zulu, Xhosa, Arabic etcetera. So in conclusion, my friends, Romans and countrymen, I would say that the discussion about slang and proper language is probably more valid to be in the Africa Forum than some of the others.
Et tu Brutus?!!