Have you ever seen your company logo, client logo, or other specific text rendered with an unexpected font? Here's what's happening: You've selected a particular text font for your purpose, but the end user, recipient, or whomever, does not have that font loaded on their workstation so AutoCAD is substituting another font in its place.
Here's a cheat to ensure that your logo is never rendered incorrectly. Convert it to geometry with the Express Tool TXTEXP. This tool explodes Text or Mtext into closed polylines suitable for hatching. It can be found under Express > Text > Explode text.
The image above shows a line of text with an unusual font and the same text exploded with TXTEXP. The next step would be to Hatch the resultant polylines with a solid fill pattern. Now you have geometry that will always display and plot as expected.