I've checked all pages via Inspect Element to verify the font-family and I believe the same font, and font-size, is being used for paragraphs/normal text. If, however, that doesn't seem to be the case, then if I can be provided with the pages that you believe do not share the global font-family then please let me know about them so I can investigate them further and more specifically.

Other than that, I'm certain the same font-family is being used throughout the website i.e. Open Sans.