A cultural evaluation of Usability Engineering in the Namibian context reveals a number of good practices as well as locally inadequate methods. One major challenge in cross-cultural Usability Engineering is the implicit western understanding of usability and its associated assumptions which often lead to a locally inappropriate usability evaluation. Conceptualisation sessions held with different Namibian user groups confirmed a deviating perception of the term "usability". None of the groups mentioned terms "commonly" associated with "usability" such as speed, learnable, or memorable. Thus standard usability testing comprises a dual bias through the western definition of usability and the related choice of methods which aim to test an already biased objective. We therefore suggest an ethno-centric software development framework which incorporates a contextual redefinition of usability.