I'm trying to figure out a comfortably legible base font-size for all screen sizes, on a platform that supports several languages. Anyone worked on a similar project? If so, what was your outcome and why? Thanks in advance for your help!
The Web Content Accessibility Guidelines recommend that any web font sizes be adjustable by the user.
For large fonts WCAG says: "The actual size of the character that a user sees is dependent both on the author-defined size and the user's display or user-agent settings. For many mainstream body text fonts, 14 and 18 point is roughly equivalent to 1.2 and 1.5 em or to 120% or 150% of the default size for body text (assuming that the body font is 100%), but authors would need to check this for the particular fonts in use." -- https://www.w3.org/TR/2008/REC-WCAG20-20081211/
If large fonts are 14 pts, standard body font should be around 12 pts.