It might make more sense to refer to the individuals in this story by their names, and leave out the relationships which are doubtful. Neither characters, the Kenyan student and the daughter of Madelyn and Stanley Armour Dunham appear to be the natural parents of Obama.
When Barrack Hussein Obama arrived from Kenya in 1959 he came at a time when Jaramogi Oginga Odinga, father of Raila Odinga, had given up his 'kingship' (chieftain?) was Vice President of Kenya and in good stead with Khrushchev:
The Russians gave Oginga Odinga a number of scholarships for young Kenyans to attend university in Moscow.
PATRICE LUMUMBA UNIVERSITY MOSCOW
Although one of the sons of Oginga Odinga received a scholarship to Lumumba University, Raila the other son attended university in East Germany iirc. Raila claims Obama as a relative, most likely for no other reason than to shore up the fiction of the Obama paternity.
Russia, claiming to free various African states from Colonialism made deep penetration into Africa, meanwhile, your Paul Robeson had a history of sucking up to his hero Stalin. Robeson lived in Moscow for a time...
And it was Paul Robeson who persuaded Frank Marshall Davis to move to Hawaii, according to Frank. Frank Marshall Davis, who came from Chicago with a background in a cabal that had in their history the translation and publication of the works of LENIN.
So in 1959 when the student from Kenya arrived in Honolulu, Frank Marshall Davis would have been there to meet him, I imagine...
Stanley Ann Dunham apparently did have a second language, anecdotal information is that she spoke French.
PS. THE USSR IS NO MORE. Putin has seen to it that THE GULAG ARCHIPELIGO by Solzhenitzyn, exposing Stalin, is part of the curriculum in Russian schools.