Of the Swahili-speaking African countries/East African countries -- Uganda, Kenya, Tanzania, Burundi at a pinch -- did any of them have an embassy or consulate in Hong Kong in 1965? If not, would it be remotely plausible for a native of one of those countries who received a British education to be working as a British translator in Hong Kong?
There's no "hong kong (misc)" or "colonial history" so I've sort of tagged this with the kitchen sink.