Choose a brand typeface: matches personality, readable at all sizes, sufficient Vietnamese diacritics

Typeface is the most long-term identity decision in the brand system. Colors can be adjusted seasonally, images can change with campaigns, but once the type is printed on packaging, signage, and websites, the cost to change it is very high. Therefore, this choice needs to be based on three criteria in clear order of priority: personality first, legibility second, and finally, a complete set of Vietnamese diacritics.

Typography is the visible language

Ellen Lupton, author of Thinking with Type, writes that "typography is what language looks like." This statement is not decorative. Before a reader understands a word, their eyes have already received signals from the shape of the letters. A serif typeface suggests durability and roots. A geometric sans-serif typeface suggests modernity and precision. A display typeface that mimics handwriting suggests craftsmanship and personalization.

The issue is not which type is more beautiful. The issue is which type aligns with what your brand is trying to convey. A dental clinic using a casual handwritten font and a handicraft workshop using a geometric sans-serif will create conflicting signals, even though both typefaces are perfectly fine in their correct contexts.

Typography is what language looks like.

Ellen Lupton, Thinking with Type

First step: read the brand personality before opening the font list

Before entering any font library, three questions about the brand need to be answered. First: if this brand were a person, how would they speak, formally or informally, cautiously or decisively? Second: where is the target customer at the most important touchpoint, reading on a small phone or viewing signage from a distance? Third: does the brand want to stand close to or far from competitors in the industry?

After obtaining the answers, categorizing by typeface helps narrow down choices more quickly. Classic serifs (Garamond, Cormorant) are suitable for brands that embody traditional values, heritage, or premium quality aimed at lasting elegance. Modern serifs (Playfair, Libre Baskerville) balance authority and accessibility. Geometric sans-serifs (Futura, Jost) fit technology, healthcare, or any industry that prioritizes clarity and modernity. Humanist sans-serifs (Nunito, Source Sans) are more approachable, suitable for brands that want to engage rather than impose.

Legibility: check at extreme sizes

Legibility is different from readability (the ability to read a long passage smoothly). Legibility is the ability to distinguish individual characters, especially at small sizes or from a distance. For brands, the legibility test must occur at two extremes: displaying on a 5-inch phone screen at 11pt size and on signage viewed from a distance of 5 meters.

Key points to check carefully. Distinguish between the uppercase "I", lowercase "l", and the number "1" in the same context; this is especially important for brand names and email addresses. Does the letter pair "rn" read as "m"? Is the x-height (the height of lowercase letters compared to uppercase) large enough for comfortable reading at small sizes? Are the internal spaces of the characters spacious enough or too tight when printed small?

A beautiful typeface in a catalog can sometimes completely fail this test. And this is when priorities must be clear: a typeface that is unreadable at small sizes should not be the brand typeface, no matter how elegant it looks in the presentation file.

Vietnamese diacritics: a criterion not to be overlooked for Vietnamese brands

Vietnamese uses the Latin Extended Additional character set with about 134 basic characters, including complex diacritic combinations like ợ, ươ, ặ, ẫ, ỡ. Many fonts designed well for English completely lack these characters or have poorly processed diacritic shapes, for example, the tone mark placed incorrectly, or the circumflex colliding with the diacritic above.

The practical consequences of ignoring this criterion. On the website, the browser automatically substitutes fallback fonts for missing characters, causing the identity system to break at the most critical touchpoint. In the design file, characters are replaced with small rectangles or other characters, which is particularly dangerous when sending files to printing companies that do not have all the fonts installed. On mobile applications, missing characters can cause the system to fall back to the system font, disrupting the entire visual hierarchy that has been designed.

A simple test: paste the string "Vietnamese brands need enough diacritics: ợ ươ ặ ẫ ỡ ề ổ ắ" into design software with the font being considered. If any characters display differently in shape or spacing, that is a sign the font does not fully support it.

Build a type system: two families, one purpose for each family

Most brand systems work well with two typefaces. The first type, often called the display typeface, handles headlines, brand names in applications, and touchpoints that need to make a strong impression. This type is allowed to have a more distinct personality and can be more complex in shape because it is displayed at larger sizes and readers do not need to read continuously.

The second typeface serves the body text, captions, digital product interfaces, and any long reading contexts. The criteria for choosing this typeface are legibility and controlled neutrality. "Beauty" should not be emphasized here because its task is to communicate information without creating friction.

Once two typefaces are chosen, the next step is to establish scale, weight, and spacing. These three factors determine over 70% of the perceived professionalism of a design page. A well-set ordinary typeface will look more professional than a good typeface set carelessly.

Common mistakes to actively avoid

• Choosing a font because it looks good in a specific context and then applying it throughout the system without checking other applications.
• Using more than three typefaces under the guise of "richness" actually creates visual conflict.
• Not checking commercial licenses. Some free fonts only allow personal use and prohibit commercial purposes.
• Neglecting to embed fonts in the PDF sent to the printer, resulting in font substitution in the print.
• Choosing a font that is too common and lacks distinction, making the brand look like hundreds of other brands using the same default font.

Typography is not merely an aesthetic decision. It is the foundation for the entire brand identity system. A correct choice from the start, based on three criteria in the right order of priority, will save more costs in rework than any other aspect of the branding process.