How to Preserve Custom Fonts When Translating Google Slides

How Font Preservation Works in Slide Buddy

When Slide Buddy translates your slides, it replaces the text content of each text run but preserves all style properties — including the font family. If your heading uses Montserrat Bold at 36px in #1a73e8, the translated heading will still be Montserrat Bold at 36px in #1a73e8.

This works because Slide Buddy operates through the Google Slides API, which separates text content from text styling. Translation only touches the content; the styling stays locked in place.

When Fonts Fall Back to Arial

There's one scenario where your custom font won't display correctly after translation: glyph coverage. Every font has a set of characters (glyphs) it can render. If you translate into a language that uses characters not in your font, Google Slides falls back to Arial (or another system font) for those characters.

Common examples:

• Latin-only fonts + Chinese/Japanese/Korean: Most Latin fonts (Montserrat, Raleway, Playfair Display) don't include CJK glyphs. Google Slides will show Arial or Noto Sans CJK instead.
• Latin-only fonts + Arabic/Hebrew: Same issue — RTL scripts need dedicated glyph sets.
• Decorative fonts + accented characters: Some decorative fonts lack Eastern European diacritics (ř, ž, ő). Characters fall back to Arial.

This is a Google Slides behavior, not a Slide Buddy limitation. The font is still specified in the slide — Google Slides just can't render glyphs that don't exist in the font file. See our full font fallback troubleshooting guide.

Google Fonts vs Local Fonts

Always use Google Fonts for multilingual decks. Google Fonts are rendered server-side — every viewer sees the same font, regardless of what's installed on their computer. Fonts like Noto Sans, Roboto, and Open Sans have excellent Unicode coverage across Latin, Cyrillic, Greek, and many other scripts.

Local fonts (installed on your computer but not on Google Fonts) are a different story. Google Slides may display them correctly for you, but collaborators may see Arial instead. After translation, the problem compounds — your collaborators might see Arial for both the font AND the missing glyphs.

Best Practices for Font-Safe Translation

• Use Noto Sans for maximum language coverage. Google's Noto font family covers 100+ scripts. If multilingual translation is a core workflow, Noto Sans is the safest base font.
• Test your target language before full translation. Translate one slide first and check if your font renders correctly for the target language.
• Keep your brand font for Latin-script languages. If you're translating English → Spanish/French/German/Portuguese, most brand fonts work fine — these all use Latin script.
• Accept font fallback for CJK/RTL as a trade-off. If you need Chinese or Arabic versions of your deck, font fallback to Noto Sans CJK or Noto Sans Arabic is expected and professional-looking.

Video: Font Preservation in Action

Watch this quick demo showing how Slide Buddy preserves custom fonts, colors, and alignment during translation:

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