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Copy there
Long-press the comment in X, Facebook, Instagram, TikTok, Reddit, YouTube, or wherever you already are.
Copy a comment from the app you’re already in. Paste it here. Spelle translates it, you write the reply the way you think, and Spelle hands back a spell-checked version ready to paste on the original post.
Looks for the Spelle backend first. If the Grok key is not set, it uses the browser preview.
Long-press the comment in X, Facebook, Instagram, TikTok, Reddit, YouTube, or wherever you already are.
Paste it into Spelle. It comes back in the language you actually read, so you are not guessing the tone.
Write the reply in Spanish, Vietnamese, Arabic, English — whichever one you think in. Short is fine.
Spelle translates it into the thread’s language, checks spelling, and leaves it ready to copy onto the original post.
Spelle is the bridge for people who are not fluent in the language of the comment. No new social account. No API key. No browser extension fighting the app. You stay in the app you opened, and Spelle only holds the text long enough to translate and check it.
It does not post for you. Social apps do not allow a third app to drop a reply into a thread. Copy and paste is the reliable path, and it is the whole product. It also does not ask you to bring an AI key. The key stays with Spelle.
A raw machine translation still looks like a raw machine translation. The last step is a spelling and polish pass: names stay names, the reply stays as long as you wrote it, and slang is only softened if you ask. Then one tap copies it.