I have always thought of it as mod-x, where the mod sounds like the mod in "mod squad" or "module". However I recently watched a
video tour of modx in youTube (very good video series on modx BTW) where the author pronounces it mode-x. Although 100% fluent in english, I have been living oversees for a long time so I may have a distorted understanding.
In (Brazillian) Portuguese it would be mod. The x in potuguese sounds like 'cheez' (not quite cheese but close to it), so the Portuguese pronunciation is mod-cheez.
So, how do you pronounce it.