Sounds wonderful. Well done.
In order to find commercial viability (or a business model), it would be best to try answer the following question: which 'pain' / problem does your solution solve for people (or can solve for them with certain changes).
For example: if there is a known problem/pain of people who come to Nigeria and are then unable to communicate properly because of the language barrier, then this could be a wonderful tool (mobile app?) for them, which they would be willing to pay to use. Or maybe vice versa: many Nigerians have difficulty speaking English to people who come to Nigeria (although you need to be sure that they would be willing / able to pay for your service).
I think that there are many other options and would be happy to help you discuss them (free of charge - with the intention of 'partnering' with you if it looks to be profitable) - https://clarity.fm/assafben-david/probable653
Good luck