How to Comment in English When It Isn't Your First Language

If English isn't your first language and you comment on LinkedIn or Instagram in it, the thing slowing you down is probably not grammar. Grammar you can check, and a small article error costs you almost nothing. What actually costs you is register: the gap between English that is correct and English that sounds like it belongs in that particular comment section.

"I would like to kindly ask what your opinion on this matter is" is flawless English. It also reads, in an American LinkedIn comment thread, like a letter from a bank in 1974. Nothing in a grammar checker will tell you that, because nothing about it is wrong.

The real cost isn't the mistakes. It's the comments you don't write

Here's what the problem actually looks like in practice. You read a post, you have a genuinely good thought about it, and then you spend four minutes constructing two sentences, reread them twice, decide they sound off, and close the tab. Repeat that across a month and the cost isn't a handful of awkward comments. It's the thirty comments that never got written, on posts where you had something worth saying.

That's a participation problem wearing a language problem's clothes, and it's worth naming because the fix is different. You don't need better English. You need to stop paying four minutes per comment for a level of caution the situation doesn't require.

What actually gives a comment away (and it isn't your accent in writing)

Worth being clear about this, because the anxiety is usually pointed in the wrong direction. Readers do not penalise a missing article or a slightly odd preposition. They barely register it. What they do penalise is a comment that didn't respond to the post, and native speakers produce those by the thousand every single day. "Great insight, thanks for sharing" is grammatically perfect and completely worthless, and the person who wrote it grew up speaking English.

So the bar to clear is lower than it feels, and it's a different bar than the one you're aiming at. A comment that references something specific from the post, with one small preposition error in it, beats a flawless comment that could sit under anything. That order of priority almost never gets stated out loud, which is why so much effort goes into the wrong half.

Four habits that make English comments read naturally

Write shorter than feels polite

Long sentences are where second-language writing goes wrong, and they're also where it sounds least confident. English comment sections reward brevity to a degree that surprises speakers of languages where elaboration signals respect. Two short sentences read as assured. The same content in one long subordinate-clause sentence reads as hesitant, and gives you four more chances to slip.

Use contractions

This is the highest-leverage change on the list and it takes no skill at all. "It's," "doesn't," "I've," "that's." Textbook English teaches the expanded forms because they're safer to teach; conversational English uses contractions constantly. Writing "I do not think that is correct" instead of "I don't think that's right" is the single clearest marker of formal register, and in a comment section formal register reads as distant rather than as careful.

Skip the idioms

Idioms are the worst risk-to-reward trade in the whole business. Get one exactly right and you gain nothing, because nobody notices a correctly used idiom. Get it slightly wrong and it's the one thing in your comment anyone remembers. The same applies to jokes built on wordplay. Plain description of a real thing works in every language and never misfires.

Never apologise for your English

"Sorry for my English" does the one thing you were trying to avoid: it directs attention to your English. Before that line, readers were reading your point. After it, they're assessing your grammar. Nobody has ever thought better of a comment because of that sentence. Delete it.

Read three comments before you write one

Register is not learnable from rules, but it is readable off the page in about fifteen seconds. Before commenting, look at the three comments already there. How long are they? Does anyone use emoji? Is anyone using first names? Is it "Hi Sarah, great post" or straight into the point with no greeting? Comment sections have local conventions that vary between LinkedIn and Instagram, between industries, and between the same person's professional and personal posts. Copying the room is faster and more reliable than trying to derive it.

One convention that catches people out repeatedly: on English-language LinkedIn, opening a comment with "Dear" or "Sir" reads as significantly more distant than the equivalent does in many other languages. Comments there usually start with the point, or with the author's first name and nothing else.

Why reviewing a draft is easier than writing one

This is the asymmetry worth understanding, because it's the whole reason a drafting tool is more useful in a second language than in a first. Recognising that a sentence sounds right is a much lower bar than producing one from nothing. You almost certainly already have the judgment to tell that "I would like to kindly ask" is stiff, even if you wouldn't have generated "curious how you'd handle that" yourself. Reading is ahead of writing for nearly everyone learning a language, and that gap is exactly what a draft closes.

So the four minutes turn into fifteen seconds, and the fifteen seconds are spent on the thing you're actually good at: judging whether this is what you meant. That's the mechanism. It isn't that the tool writes better English than you could. It's that checking is faster than composing, and you were bottlenecked on composing.

How the language settings actually work

Two modes, and which one you want depends on your situation. Left on auto-detect, Comment Generator drafts in whatever language the post is written in, so an English caption gets an English comment and a Spanish one gets Spanish, with no switching. That's the right setting if you move between languages during the day.

Set a preferred language instead and every draft comes back in that language regardless of the post. Useful in the obvious direction, English comments on English posts, and in the less obvious one: if you want to comment in your own language on an English post, to signal where you're from or because your audience is local, that's the setting for it.

The part that matters more than either: drafts are written in the target language rather than translated into it. Those produce noticeably different results. A translated comment carries the sentence structure of the original language and lands slightly wrong in a way that's hard to point at, which is the exact failure this is supposed to solve. English, German, French, Spanish, Portuguese, Indonesian, Hindi, Chinese, and Urdu are all covered, and the quality gap between English and the others narrowed considerably with the move to Claude Sonnet 5. The extensions are available for Instagram, LinkedIn, and Threads.

Put your own phrasing in the instructions field

One setting worth using properly. The free-text instructions apply to every draft, and it's the place to record the things you know about your own voice: a phrase you always use, a word you dislike, whether you want questions at the end, how formal you want to sound. If you tend to be more direct than English comment sections usually are, say so there and the drafts stop softening it. It's your voice as a set of rules rather than something you reconstruct from scratch each time.

The step that doesn't change

Read every draft before you post it. Not because the English will be wrong, but because a draft doesn't know your relationship with the person who wrote the post, and register is exactly the kind of judgment that needs a human who knows the room. That argument in full is in why AI-drafted comments still need a human in the loop, and for what makes a comment worth posting at all, in any language, how to write genuine LinkedIn comments has the structure.

The goal isn't to sound like a native speaker. It's to stop losing thirty good comments a month to a four-minute tax on writing two sentences.