French Grammar Checker for Mac — Fix Errors Instantly

If you write in French regularly — whether for work, studies, or daily communication — you know that French grammar checker tools are essential. French has notoriously complex rules around verb conjugation, gendered nouns, and subtle punctuation conventions that trip up even fluent speakers.

WunderType lets you build a dedicated French Grammar Checker as a custom prompt on your Mac. Select your French text in any app, press a keyboard shortcut, and get corrected text back in place — no copy-pasting into a browser tab, no switching between windows.

Why You Need a French Grammar Checker on Your Mac

French grammar is full of pitfalls that spell checkers miss entirely. Consider these common challenges:

• Past participle agreement: Should it be "Je suis allé" or "Je suis aller"? The past participle must agree with the subject when using être as an auxiliary — a rule that even native speakers get wrong.
• Subjunctive mood: Knowing when to use "il faut que je fasse" versus "il faut que je fais" requires understanding which expressions trigger the subjunctive.
• Gender agreement: Every adjective, article, and past participle must match the gender and number of its noun. Miss one and your sentence reads awkwardly.
• Punctuation conventions: French uses non-breaking spaces before colons, semicolons, question marks, and exclamation marks — something most English keyboards do not handle automatically.

A basic spell checker will catch "boulangerie" vs "boulengerie", but it will not fix a past participle that fails to agree with a preceding direct object. That is where an AI-powered grammar checker excels.

How the French Grammar Checker Works in WunderType

Setting it up takes about thirty seconds:

1. Open WunderType from your menu bar and click Add Custom Prompt.
2. Name it "French Grammar Checker" and write an instruction like: "Correct all French grammar errors in the text. Fix verb conjugation, past participle agreement, gender and number agreement, and punctuation. Keep the original meaning and tone. Return only the corrected text."
3. Assign a keyboard shortcut — for example, ⌥⇧⌘F.
4. Select any French text in any application and press your shortcut. Done.

Before and After: French Grammar Correction in Action

Here is a real example of what WunderType's French Grammar Checker catches:

Before:

Je suis aller au magasin hier. J'ai besoin d'acheter du pain et du fromage. C'est très important, vous voyez? Il faut que je...

After:

Je suis allé au magasin hier. J'ai besoin d'acheter du pain et du fromage. Cela est très important, n'est-ce pas ? Il faut que je...

Notice the corrections: "aller" becomes "allé" (past participle agreement with être), the informal "C'est très important, vous voyez?" is refined to "Cela est très important, n'est-ce pas ?" with proper French punctuation spacing before the question mark. These are exactly the kinds of errors that standard spell checkers overlook.

Grammar Correction, Not Translation

This is different from a translation prompt. If you need to convert English text into French, WunderType can do that too — but the French Grammar Checker is designed for text that is already written in French. It is built for:

• Students writing essays, dissertations, or homework in French
• Expats and immigrants drafting emails, filling out forms, or communicating with local businesses
• Professionals who work in French-speaking markets and need polished, error-free correspondence
• French learners who want instant feedback on their writing to improve faster

Works Everywhere on macOS

Because WunderType operates at the system level, your French Grammar Checker works in every app — Mail, Pages, Notes, Slack, Notion, Google Docs in Safari, or any text field on your Mac. There is no need to open a separate grammar-checking website or paste text into yet another tool.

You can also create multiple French-related prompts for different needs: one for grammar correction, another for formal tone adjustment, a third for simplifying complex sentences. Each gets its own keyboard shortcut.

Start Checking French Grammar on Your Mac

WunderType is a free macOS menu bar app. Download it, create your French Grammar Checker custom prompt, and start writing better French today.

Download WunderType on the Mac App Store