SSML (Speech Synthesis Markup Language) is the control layer for text-to-speech. Plain text tells a TTS engine what to say; SSML tells it how — where to pause, what to emphasize, how fast to speak, and how to pronounce words the engine would otherwise get wrong.

For corporate and product voice-over, the critical features are pronunciation and interpretation. A tag can force your brand name to be said correctly in every language. tells the engine to read “2026” as a year, “B2B” as letters, and “3/4” as a fraction rather than a date. and shape the rhythm so specification lists sound spoken, not read.

Without SSML, AI voice-overs betray themselves in exactly these places: model numbers read as gibberish, units mangled, emphasis landing on the wrong word. With it — plus a custom pronunciation lexicon — AI narration passes native-speaker review.

SSML is a core part of MediaLocalize’s AI dubbing workflow: every script gets SSML markup tuned per language, and every project builds a pronunciation lexicon covering your brand names, model numbers, and terminology — verified by native speakers before delivery.