Grammarly Multilingual Launch: AI Writing Now Supports 5 New Languages Including Spanish and French

After 16 years as an English-only platform, Grammarly multilingual support just broke the company’s biggest limitation — and the timing couldn’t be more strategic.

The AI writing assistant that 40 million people rely on daily has officially launched Grammarly multilingual support, expanding its core features to Spanish, French, Portuguese, German, and Italian. This isn’t a half-baked translation layer bolted onto an English engine. It’s a ground-up expansion that brings the same red-underline grammar corrections, paragraph-level rewrites, and a brand-new in-line translation feature covering 19 languages.

What Grammarly Multilingual Actually Delivers

Let’s cut through the marketing and look at what’s actually new. Grammarly multilingual support rolls out three core capabilities across all five new languages:

Grammar and Spelling Corrections: The signature red underlines now flag errors in Spanish, French, Portuguese, German, and Italian — matching the real-time correction experience English users have relied on for years. This means native-level grammar checks running directly in your browser, desktop app, or any of the 500,000+ applications where Grammarly integrates.

Paragraph-Level Rewrites: This is where it gets interesting. Users can now refine entire paragraphs for tone, style, and flow with a single click — in any of the five new languages. Writing a formal client email in German? Click once to adjust the formality. Drafting a casual social media post in Spanish? One more click to shift the tone. This feature alone sets Grammarly apart from basic spell-checkers.

In-Line Translation: Perhaps the most practical addition — users writing in English or any of the five supported languages can instantly translate their text into 19 different languages without leaving their workflow. No switching tabs, no copy-pasting into Google Translate. It happens right where you’re writing.

Why This Launch Matters More Than You Think

Nearly 1 in 5 people in the United States speak multiple languages. Globally, multilingual professionals represent the majority of the workforce in industries like tech, finance, and international trade. Yet until this week, the world’s most popular AI writing assistant only worked in English.

“Our customers have been asking for multilingual support, and we’re meeting them where they are — not just in the 500,000 apps and websites where Grammarly already works, but also in the languages that they think, learn, and communicate in daily,” said Ailian Gan, Director of Product Management at Grammarly.

The numbers back this up. Grammarly ran early trials with over 1 million users who had access to the multilingual features, and the company reports “immediate, high adoption across key markets.” That’s not surprising — when your tool already integrates with half a million apps, removing the language barrier is essentially unlocking a massive new user base overnight.

How Grammarly Multilingual Compares to the Competition

Grammarly isn’t the first to offer multilingual writing assistance. LanguageTool has supported multiple languages for years. DeepL Write offers AI-powered writing improvements in several European languages. And general-purpose AI tools like ChatGPT and Claude can assist with writing in dozens of languages.

But Grammarly’s advantage lies in distribution. With integrations across 500,000+ applications — from Google Docs and Gmail to Slack and Microsoft Teams — Grammarly multilingual support meets users exactly where they’re already writing. You don’t need to open a separate app or paste text into a chat window. The corrections appear in real time, in context, wherever you type.

The enterprise angle is equally compelling. Grammarly serves 50,000 organizations and 3,000 educational institutions. For multinational companies with teams writing in multiple languages, having a single AI writing platform with enterprise-grade security is a significant upgrade over cobbling together separate tools for each language.

What’s Coming Next: Blue Underlines and AI Agents

The September launch is just phase one. Grammarly has already announced that Spanish speakers will receive advanced clarity suggestions — the blue underlines that English users see for style improvements — later in 2025. Other languages will follow in 2026.

More importantly, Grammarly plans to build multilingual writing support directly into their recently launched AI agents in Grammarly Docs. This means users will be able to draft, edit, and refine documents in multiple languages using AI-powered workflows — a natural evolution that positions Grammarly as more than just a grammar checker.

Platform Availability and Pricing

Grammarly multilingual features are available now in beta on Windows, Mac, and Chrome. The feature is accessible across all subscription tiers — Free (with limited features), Pro, Enterprise, and Education. No additional installation is required; existing users can access the new language features immediately upon login.

This is a smart move from Grammarly. By including multilingual support in the free tier, they’re lowering the barrier for non-English speakers to try the product — and creating a natural upgrade path to Pro and Enterprise plans once users experience the full rewrite and translation capabilities.

The Bottom Line

Grammarly’s multilingual launch represents one of the most significant product expansions in the company’s history. For the 40 million users who already depend on Grammarly, it means their writing assistant finally works in more of the languages they actually use. For the hundreds of millions of multilingual professionals worldwide who’ve never had a reason to try Grammarly, that reason just arrived.

Whether you’re drafting proposals in French, responding to clients in Portuguese, or managing a multilingual content strategy, having AI-powered writing assistance that works natively across languages — and across 500,000+ apps — is a genuine productivity upgrade worth exploring.