There is not much restriction on OFL-licensed fonts usage in documents.
See this question in the OFL-FAQ:
Question: 1.13 Does embedding alter the license of the document itself?
Answer: No. Referencing or embedding an OFL font in any document does not change the license of the document itself. The requirement for fonts to remain under the OFL does not apply to any document created using the fonts and their derivatives. Similarly, creating any kind of graphic using a font under OFL does not make the resulting artwork subject to the OFL
And this question:
Question: 1.1 Can I use the fonts for a book or other print publication, to create logos or other graphics or even to manufacture objects based on their outlines?
Answer: Yes. You are very welcome to do so. Authors of fonts released under the OFL allow you to use their font software as such for any kind of design work. No additional license or permission is required, unlike with some other licenses. Some examples of these uses are: logos, posters, business cards, stationery, video titling, signage, t-shirts, personalised fabric, 3D-printed/laser-cut shapes, sculptures, rubber stamps, cookie cutters and lead type.
Beyond usage in documents, and if the font is modified, see also this answer on the Open-Source Stack Exchange.
See also several related fonts-license questions in the Open-Source Stack Exchange such as: