At the moment 'morph_translate' attribute is described as
morph_translate - Optional reserved attribute, if the value is set to 0, the translation operations described above are not applied.
Combined with the section above describing all the transformations done to the cell position / orientation, this made me think that none of the translations are applied.
As @hernando clarified though, it is relevant for re-centering only.
If we need this attribute at all, we should rename it and update the description.