"I am eating with my teacher."
Translation:Ninakula na mwalimu wangu.
You are right, 'who is mine' aka "wangu" 'what is mine' aka "langu" aka "yangu" "kwangu" aka "mwangu" among some other few play a huge role in the proper workings of a kiswahili sentence. I'm continuing with this course to oversee as a user Duo's Kiswahil pedagogy. Really curious..
And yes there are very many specific rules to ordering sentences in Kiswahili. I advise you look up "NGELI ZA KISWAHILI" . They teach us here all about them in kiswahili classes . They're about 10.