In org mode
/word/ will display the word in italic. For me on Linux, that works for some fonts like Liberation or DejaVu but doesn't work for others, like Monaco, Noto, Inconsolata. I think fonts were installed correctly since I can use them in other applications.
When I use Monaco on an OS X in org-mode italic works just fine.
Any ideas what might be wrong? Is the problem likely to do with the fonts or some org mode configuration?