Its Viet Hoa support is baked in, not bolted on. For product managers, developers, and designers localizing for Vietnam, choosing Source Sans Pro means one less variable to worry about. The accents will just work.
Originally intended for user interfaces, it maintains high readability even at small sizes. source sans pro viet hoa
Because it was designed for user interfaces and readability on screens, Source Sans Pro possesses specific characteristics that make it ideal for web and app design: Its Viet Hoa support is baked in, not bolted on
A single vowel can have up to three distinct marks (for example, the letter 'ê' in "thê" can become 'ề' as in "trề"). In many standard Western fonts, these marks are often poorly designed: not bolted on. For product managers