That is twi (pronounced “chwee”, the principal native language of Ghana), for Welcome.
I was just welcomed to Ghana by a sign in the airport which read something as follows:
Ghana warmly welcomes all visitors of goodwill.
Ghana does not welcome paedophiles and other sexual deviants.
Indeed, Ghana applies extremely harsh penalties for such sexually aberrant behaviour.
If you are planning to engage in any such activities, we suggest that you go elsewhere.
Fortunately for me I am a visitor of goodwill and not a sexual deviant. I am here visiting IPA Ghana and doing a bit of work on setting up a new project.
Tips on things to see and do are very welcome!