Manga sound effects (SFX) are Japanese words drawn straight into the artwork to show a sound, an action, or a feeling, like ドン for a heavy impact or ドキドキ for a pounding heart. They aren't printed text sitting in a clean font inside a bubble, they're hand lettered as part of the line art. That's exactly why a camera translator or an OCR based app almost never catches them. The bubbles get translated. The SFX next to them usually don't. Here's what the common ones actually mean, and what to do about the gap.
The three families every SFX belongs to
Japanese groups sound words into three rough categories, and knowing which one you're looking at tells you what to expect from it.
- Giseigo: real sounds made by a living thing. A bark, a cough, a scream.
- Giongo: sounds from the world around that thing. Rain, footsteps, glass breaking.
- Gitaigo: not a sound at all. A feeling or a state, drawn as if it were one.
That third category trips up new readers the most, because there's nothing to literally hear. シーン (shiin) for dead silence is a gitaigo joke as old as manga itself. Silence obviously makes no noise, and Japanese writes it as one anyway.
Why translators skip them, Yomi included
Speech bubble text sits inside a clean, consistent shape with a light background, which is exactly what OCR was built to read. SFX are the opposite on every count. They're warped to match the motion of the panel, overlapping the artwork instead of sitting apart from it, sometimes rotated forty five degrees, and drawn in a heavier or scratchier line than the rest of the page. A translation engine trained to find bubble shaped text mostly doesn't recognize SFX as text at all, it reads them as art, because structurally, that's what they are.
Yomi replaces the Japanese inside a speech bubble with English fitted to the same shape, and its manga mode is built specifically for that in bubble swap. It does not touch lettering baked into the artwork, and neither does any other camera or app based manga translator we've tested. That's not a translation failure to apologize for, it's a structural limit of reading text off a drawn page instead of a script file. The honest fix isn't a smarter algorithm, it's knowing the dozen or so SFX that show up constantly, so you're not stuck the moment the bubble text is solved and the panel around it isn't.
The sound effects you'll actually run into
Manga uses hundreds of SFX, but a small set does most of the work across genres. This is the shortlist worth actually knowing, not the exhaustive dictionary version.
| SFX | Romaji | Family | What it means |
|---|---|---|---|
| ドキドキ | dokidoki | Gitaigo | A heart pounding, nerves or excitement |
| ドン | don | Giongo | A heavy thud or impact |
| ゴゴゴゴ | gogogo | Gitaigo | Ominous pressure or a threat building |
| シーン | shiin | Gitaigo | Total silence, often played for comedy |
| ザワザワ | zawazawa | Giongo | A crowd murmuring, something's off |
| ガシャン | gashan | Giongo | Something breaking or crashing |
| ゴクリ | gokuri | Giseigo | A nervous gulp |
| ニコ | niko | Gitaigo | A quiet, knowing smile |
| キラキラ | kirakira | Gitaigo | Sparkle, something dazzling or admired |
| ハァハァ | haahaa | Giseigo | Heavy breathing, after running or crying |
| ビシッ | bishi | Giongo | A sharp, decisive snap or pose |
| シュン | shun | Gitaigo | Visibly deflating, gloom |
Learn these twelve and you'll follow most action and slice of life pages without reaching for a dictionary. Horror leans on a quieter set (drips, creaks, a held breath), sports manga leans on impact sounds almost exclusively, and the table above is the part that crosses genres.
How to actually read them, not just look them up
Two habits get you further than memorizing a list.
Pay attention to the shape before the sound. A jagged, angular SFX is almost always violent or sudden. A soft, rounded one is calm or cute. Artists lean on this so hard you can often guess the family, giseigo, giongo or gitaigo, from the lettering alone, before you've translated a single character. It's the same visual shorthand a reader who's never studied Japanese still picks up after a few volumes.
And pair your tools instead of expecting one to do everything. Use a bubble translator for the dialogue, so the story itself never stalls, and treat SFX as flavor text you absorb over time rather than a lookup task. That habit is also the fastest way to get more out of reading raw manga: the dialogue tells you what's happening, the sound effects tell you how it feels, and you don't need to solve both at native speed to enjoy the page.
If you're weighing which app to lean on for the dialogue half of that pairing, our breakdown of manga translator apps covers what actually separates a bubble first tool from a general camera translator. New to translating manga yourself at all? How to translate manga walks through the basic method from the start. And if you're curious how much manga never gets an official English version in the first place, we measured it: the number is higher than most fans guess.
Read the story, feel the sound
SFX were never meant to be read the way dialogue is. They're closer to a sound cue in a film: meant to land in half a second, not get parsed word by word. Once you know the dozen that repeat constantly, the rest start making sense from context, the same way they do for a native reader who never studied them either. Import a page, tap a bubble for the dialogue, and let the ink around it do the rest.