Grammar correction,
explained.

A real grammar checker does more than verify subject-verb agreement. It understands that “gonna” isn’t “going to”, that “you guys” isn’t a mistake in a casual email, that the informal tone of your message isn’t an error to fix: it’s an intent to respect. Here is what separates a useful checker from a clumsy rewriter, and how Grammatikai built its own around a single rule: respect your voice.

What is a grammar checker?

A grammar checker is a tool that detects and fixes objective mistakes in a text, without touching its style. It handles what is wrong, not what is awkward. It doesn’t decide whether a sentence is too long or too short; it decides whether it is grammatically correct.

In practice, a checker handles five main categories of mistakes: spelling, grammar, conjugation, punctuation, typography. What it doesn’t do is just as important, and rarer to find.

A good checker is not a rewriter. It doesn’t turn “glad to see you” into “I experience deep pleasure upon your arrival”. The first sentence has no mistake: “correcting” it would betray it.

The five main error families

Not all mistakes are equal. A solid checker handles each of these families with the same rigor, without over-treating one at the expense of the others.

Spelling

Missing letters, wrong accents, misplaced capitals. This is the most “visible” family, and often the least critical, because it is the easiest to detect. A modern checker spots them effortlessly: recieve → receive, its vs it’s.

Grammar

Subject-verb agreement, tense consistency, relative pronouns, sentence construction. This is where basic checkers start to struggle: the children plays → the children play is easy, the crises we have went through → been through calls for finer analysis.

Conjugation

Past participle, subjunctive, tense agreement. English conjugation has its traps, and other languages (French, Italian, German) have minefields. A good checker knows the rules AND the exceptions: I wish he comes → I wish he came, if I was → if I were in the subjunctive.

Punctuation

Commas, apostrophes, quotation marks, em dashes. Rules differ from one language to the next: French quotation marks are chevrons « like this », not the straight “like that”. A checker respectful of the source language picks the right ones.

Typography

Non-breaking spaces before colons in French, capital after period, hyphenated compounds. This is the finest layer, the one that separates a “clean” text from a “publishable” one, and the one most checkers ignore.

What is well conceived is clearly said, and the words to say it come easily. Nicolas Boileau, The Art of Poetry

When to run your text through the checker

You might think the checker is only for the very end, right before sending. In practice, it fits at five distinct moments in writing, each with its own expectations.

1. The professional email

Before hitting send, one last pass through the checker catches typos that would make you look careless. It is not about perfection, it is about respect for your reader.

2. The cover letter

An application with three mistakes goes to the bin before it is even read. A checker attentive to agreement (“who intrigues with their drive” vs “intrigue”) literally changes your odds of being called back.

3. The thesis or long paper

Over ten thousand words, the human eye tires. A checker goes through the text without losing focus, and catches the mistakes you no longer see after rereading. It doesn’t replace proofreading: it lightens it.

4. The social media post

Even a tweet deserves correction. Paradoxically, mistakes stand out most in short formats: fewer words, more attention on each one. A LinkedIn post with a conjugation mistake is a reputation that collapses in two seconds.

5. The internal memo

Announcing a decision to twenty colleagues with a typo is handing the coffee machine a conversation topic for a week. A quick checker run avoids the snark.

Basic checker vs smart checker

Not all checkers are equal. The main difference fits in one word: context. A basic checker applies rules; a smart checker understands the writing situation.

In practice: a basic checker flags “gonna” as informal to replace with “going to”. A smart checker understands that in a text to a friend, gonna is perfect, and in a letter to a dean, it isn’t.

What a checker must NOT do

Most current checkers do too much. They want to “improve” your text, and end up flattening it. Here are the habits to spot before handing a text to a tool.

Over-formalize

Turning I think that into it appears to me that, I liked it into I derived enjoyment from the reading. That’s not correcting, that’s rewriting. And it is the cardinal sin of today’s checkers.

Ignore context

Flagging “yeah” as a mistake in a novel’s dialogue. Flagging a contraction in a text to a friend. A smart checker knows when to stay out of the way.

Detect ghost mistakes

False positives are worse than false negatives. A checker that underlines a perfectly correct word in red loses credibility with each alert, and trains you to ignore the real ones.

Flatten the voice

Two different authors with two correctly written texts should not come out of a checker sounding the same. If they do, your tool rewrites you in your place: that’s no longer correction.

The Grammatikai approach

Our checker is built around a single rule: preserve the register. A text written casually stays casual after correction. A text written formally stays formal. Mistakes disappear, the voice remains.

In practice: before correcting, the tool takes the context into account (register, implicit reader, existing punctuation) instead of applying rules in the abstract. Correction targets objective mistakes, not style. And it handles the 40 languages the same way, without giving English priority.

Result: you reread your text without recognizing a standard checker’s fingerprints. It is still you, in your own voice.

Mistakes to avoid when correcting

Using a checker itself calls for some care. Here are the classic traps that turn a good intention into a disappointing result.

Accepting every suggestion

A checker suggests, it doesn’t decide. Some suggestions don’t fit the register, the context, the reader. Reading each correction before approving is essential: it’s quick, but not negotiable.

Correcting without proofreading

The tool is sometimes wrong. The human eye catches what the machine misses: a double meaning, an allusion, a reference. A human pass, even a quick one, remains the final safety net.

Over-correcting an already clean text

Running the same text through the checker ten times doesn’t make it better. After a clean pass, stop. The extra iteration no longer corrects: it distorts.

Not trying other registers

After correction, a rephrase in another register can reveal a sharper version than the original. A checker alone gives you a clean text. A checker plus a rephraser gives you a finely tuned one.

Correcting with Grammatikai

The Grammatikai checker works in three steps, without friction and without signup.

• Paste or type your text in the module above.
• Pick the source language and the target language: identical for pure correction, different to combine correction and translation.
• Click Correct. The corrected version appears in seconds on average, with changes highlighted so you can approve them at a glance.
• You can edit the corrected text directly in the right card before copying.

No text is stored. Each correction is processed in memory, then erased immediately after the response. Your words stay yours, and go through no one else.