Don't ignore this warning. If you see it, click on the font's "Character Map" (usually at the bottom of the font page) to see exactly what’s included. If you’re looking for a professional-grade typeface with full multilingual support, a font triggering this warning is probably not the one for you. It's a great tool for hobbyists, but a yellow light for professionals.
: Fonts downloaded from DaFont are local files. If you open the project on a different computer that hasn't had that specific file installed, the software won't find it. Font Substitution Will Occur Dafont
Here is a "solid review" of this user experience, written from the perspective of a designer navigating the platform: Don't ignore this warning
Recommendation (practical checklist)