AI Toolbox in 10 Languages: Multi-Language & RTL UI Guide (2026)
Claude does not auto-align right-to-left (RTL) text correctly, so Hebrew and Arabic in the AI Toolbox extension surfaces can read with broken direction. The fix is the AI Toolbox multi-language UI: set the extension language to Arabic (AR) or Hebrew (HE) in the Settings page and the entire AI Toolbox interface (search popup, bookmark buttons, export menu, settings) applies dir="rtl" and mirrors to proper RTL layout. This RTL support applies to AI Toolbox's own UI, not to Claude's main chat on claude.ai, which Anthropic controls separately. AI Toolbox supports 10 locales: English, Spanish, French, German, Italian, Japanese, Chinese, Arabic, Hebrew, and Hindi.
Most Chrome extensions ship English-only. Some add a Spanish and French translation and call it done. Very few support right-to-left scripts with proper layout mirroring. AI Toolbox is one of the few. This guide covers exactly which languages are supported, what the RTL support does (and does not do), how to switch locales in Settings, and why this matters for Arabic and Hebrew speakers who use Claude daily.
One important clarification up front. The multi-language and RTL support in AI Toolbox localizes AI Toolbox's own interface - the buttons, labels, menus, and dialogs that AI Toolbox injects into claude.ai. It does not translate or mirror Claude's native chat UI, which Anthropic controls. If you want Claude itself to respond in Arabic or Hebrew, you tell Claude that in your prompt. AI Toolbox handles the extension UI around it.
What Claude does and doesn't do for RTL natively
Claude has no native RTL alignment fix for the surfaces AI Toolbox sits on. When Hebrew or Arabic text appears, the layout direction is not flipped to right-to-left automatically, so text alignment, cursor position, and punctuation placement can read incorrectly for RTL scripts. Anthropic documents Claude's general capabilities in its help center at support.anthropic.com, and Claude itself is multilingual, but a multilingual model is not the same as an RTL-aware interface. The interface direction is a separate concern. That gap, no automatic RTL layout for Arabic and Hebrew, is exactly what the AI Toolbox RTL support fills: switching the extension language to AR or HE applies dir="rtl" to the AI Toolbox root container so the extension UI mirrors correctly instead of cramming RTL text into left-to-right containers.
Browser compatibility: Chromium only, not Firefox
AI Toolbox for Claude runs on Chromium browsers: Chrome, Edge, Brave, Opera, and Arc. It is not available on Firefox. A separate competitor add-on named "Claude RTL Fix" exists only as a Firefox add-on, which means it does not help Chromium users at all. If you use Chrome, Edge, Brave, Opera, or Arc, a Firefox-only RTL add-on is not a substitute. AI Toolbox provides the RTL fix natively inside its Chromium extension UI through the language setting described below.
Which 10 Languages Does AI Toolbox Support?
AI Toolbox (formerly Claude Toolbox)'s extension UI is localized into 10 languages: English (EN), Spanish (ES), French (FR), German (DE), Italian (IT), Japanese (JA), Chinese (ZH), Arabic (AR), Hebrew (HE), and Hindi (HI). Arabic and Hebrew load with full RTL layout direction. The other eight are left-to-right. All ten are included on every plan, free and paid.
Language
Code
Script
Layout direction
Available on
English
EN
Latin
LTR
Free and paid
Spanish
ES
Latin
LTR
Free and paid
French
FR
Latin
LTR
Free and paid
German
DE
Latin
LTR
Free and paid
Italian
IT
Latin
LTR
Free and paid
Japanese
JA
Kanji/Kana
LTR
Free and paid
Chinese (Simplified)
ZH
Han
LTR
Free and paid
Arabic
AR
Arabic
RTL
Free and paid
Hebrew
HE
Hebrew
RTL
Free and paid
Hindi
HI
Devanagari
LTR
Free and paid
This covers roughly 4.6 billion speakers across the top language families on the web, per Ethnologue's top-200 languages report. For context, according to W3Techs content-language statistics, English still accounts for over 50% of websites, which is why most extensions stop there. Arabic and Hebrew together account for hundreds of millions of users who are routinely underserved by browser extensions that assume LTR layouts.
What Does Full RTL Support Actually Mean?
Full RTL support in AI Toolbox means the entire extension UI mirrors for Arabic and Hebrew: text flows right-to-left, menus open on the opposite side, icons and close buttons swap positions, and all padding/margin logical properties flip automatically. It is not just a translated string - it is a mirrored layout.
RTL done badly is an English UI with Arabic text crammed into LTR containers. Everything reads wrong. Close buttons end up where your finger expects the back button. Icons point the wrong direction. This is the dominant pattern in most browser extensions, because proper RTL requires CSS logical properties (inline-start, inline-end) rather than hardcoded left/right, plus direction-aware icon swaps, plus care that hardcoded margins do not break the layout when mirrored.
AI Toolbox uses CSS logical properties for RTL. When you switch the language to Arabic or Hebrew in Settings, the extension applies dir="rtl" to its root container and the entire UI mirrors. The search popup opens on the correct side. The bookmark and export icons swap. Padding that used to sit on the left of an icon sits on its right.
One deliberate boundary: this mirroring applies only to AI Toolbox's own UI. Claude's main chat interface on claude.ai is controlled by Anthropic and has its own localization. If Claude's native UI ships RTL for Arabic and Hebrew eventually, that will be Anthropic's doing, not AI Toolbox's. The two layer independently. Your extension UI can be Arabic RTL while the chat pane stays in whatever language and direction Claude sets.
How to Change the AI Toolbox Language in Settings
Open AI Toolbox Settings, pick your language from the dropdown, and click save. The UI reloads in the new language within a second. For Arabic and Hebrew, the full layout mirrors to RTL at the same time. No reinstall, no browser restart.
Click the AI Toolbox settings icon (gear) in the sidebar or extension popup.
Find the Language dropdown in the Settings page.
Pick your locale: English, Spanish, French, German, Italian, Japanese, Chinese, Arabic, Hebrew, or Hindi.
Save. The UI reloads in the selected language. For Arabic and Hebrew, the whole interface mirrors to RTL automatically.
Revert at any time by switching back to English or any other locale.
The language preference is stored locally. It persists across browser restarts. It does not sync across devices, so if you install AI Toolbox on a second machine you will set the language there too. For other AI Toolbox features, see the search guide, bookmarks guide, and export guide.
Need AI Toolbox in Arabic, Hebrew, Japanese, or another major language? AI Toolbox ships with 10 locales and full RTL layout for Arabic and Hebrew, included free on every plan. From the makers of AI Toolbox (formerly ChatGPT Toolbox) (25,000+ users, 4.5/5 rating). Install AI Toolbox free ->
AI Toolbox vs Other Claude Extensions on Localization
Most Claude-integrated Chrome extensions ship English-only with zero RTL support. AI Toolbox is one of the few with 10 locales and full RTL layout for Arabic and Hebrew. This matters for teams, international users, and anyone whose primary working language is not English.
Extension
Languages supported
RTL (Arabic/Hebrew)
Free on free plan
AI Toolbox
10 (EN/ES/FR/DE/IT/JA/ZH/AR/HE/HI)
Yes - full layout mirror
Yes
Most generic Claude extensions
Typically EN only
No
Varies
Generic multi-AI sidebars
Varies by product
Typically no layout mirror
Varies
This comparison is based on AI Toolbox's verified feature set from source code. Other extensions in the category may update their localization; verify before installing. The point is that 10-locale support with full RTL is rare, not universal.
Who Benefits From AI Toolbox Localization
Users who work primarily in Arabic, Hebrew, Japanese, Chinese, Hindi, or any non-English locale benefit directly from a AI Toolbox UI that speaks their language. The benefit is not theoretical - it is the difference between "I have to translate every tooltip in my head" and "the extension feels native".
Four concrete audiences. First, Arabic and Hebrew speakers who use Claude for work - developers, writers, researchers, lawyers - gain a Claude productivity extension that mirrors correctly. Second, translation teams who use Claude as a drafting partner across source and target languages benefit from an extension UI that matches their current working language instead of forcing them to context-switch. Third, educators and students in non-English-primary regions can adopt AI Toolbox without the friction of an English-only toolbar. Fourth, accessibility-conscious teams rolling out Claude to non-technical users can pick an interface language their users actually read fluently.
For developers who build localized apps themselves, working on a Claude session in Japanese or Chinese while AI Toolbox's UI also renders in that language reduces the need to translate the tooling labels in your head while you work.
What Localization Does Not Change
AI Toolbox localization changes the extension's UI only. It does not translate Claude's responses, change Claude's model behavior, or mirror Claude's native chat pane for RTL users. Those are Anthropic's territory.
Three honest limits. First, Claude itself is a multilingual model (Opus 4.7 and Sonnet 4.6 both handle many languages well per platform.claude.com), but your conversation language is determined by what you type and what system prompt Claude uses, not by the AI Toolbox language setting. If you want Claude to answer in Hebrew, tell Claude to answer in Hebrew. Second, Claude's main chat UI is localized by Anthropic. AI Toolbox does not modify it. Third, the Chrome Web Store listing and the AI Toolbox marketing pages on ai-toolbox.co may be primarily in English; locale support refers to the injected extension UI specifically.
This is the honest framing. AI Toolbox adds a localized layer on top of claude.ai. It does a good job within that layer, including full RTL. Everything outside that layer is Anthropic's product and follows Anthropic's localization decisions.
Pricing: Localization Is Free on Every Plan
Every AI Toolbox plan, including the free tier, ships with all 10 languages and full RTL support. There is no language paywall. Premium and Lifetime plans add unlimited search results, more bookmarks, and export functionality, but not additional languages.
Plan
Price
Languages
RTL
Search results
Free
$0
All 10
Yes
5 per query
Premium
$5 / month
All 10
Yes
Unlimited
Lifetime
$99 one-time
All 10
Yes
Unlimited
This is deliberate. Localization is an accessibility and inclusion feature, not a revenue lever. Free users in Riyadh, Tel Aviv, Tokyo, Delhi, or Shanghai get the same UI language support as paid users in New York. For sister extensions, AI Toolbox (formerly Gemini Toolbox) currently ships in English, and AI Toolbox has its own locale list - verify each product's locale support separately before assuming parity.
Frequently Asked Questions
What languages does AI Toolbox support?
AI Toolbox's extension UI is localized in 10 languages: English, Spanish, French, German, Italian, Japanese, Chinese (Simplified), Arabic, Hebrew, and Hindi. Arabic and Hebrew load with full RTL layout direction. All 10 languages are included on every plan, free and paid.
Does AI Toolbox support RTL for Arabic and Hebrew?
Yes. AI Toolbox supports full right-to-left (RTL) layout for Arabic and Hebrew. When you set the language to AR or HE in the Settings page, the entire extension UI mirrors automatically - text flows right-to-left, menus open on the opposite side, icons swap, and padding flips. This applies to AI Toolbox's own UI, not to Claude's main chat interface.
Will changing AI Toolbox language change Claude's response language?
No. AI Toolbox's language setting changes only the extension's UI language. Claude's response language is determined by what you type and by the system prompt Claude uses. If you want Claude to respond in Arabic, Hebrew, or another language, tell Claude that in your prompt. AI Toolbox UI language and Claude response language are independent.
How do I change the language in AI Toolbox?
Open AI Toolbox Settings, find the Language dropdown, pick your locale, and save. The UI reloads in the new language within a second. For Arabic and Hebrew, the whole layout mirrors to RTL at the same time. No reinstall or browser restart is required.
Is multi-language support a paid feature?
No. All 10 languages and RTL support are included on the free tier. Premium ($9.99/month) and Lifetime ($99 one-time) add unlimited search results, more bookmarks, and export, but not additional languages. Localization is accessibility, not a paywall.
Does AI Toolbox translate Claude's main chat interface to Arabic or Hebrew?
No. AI Toolbox localizes only its own injected UI - the search popup, bookmark buttons, export menu, and settings page. Claude's main chat interface is controlled by Anthropic and has its own localization. AI Toolbox does not modify it. The two layers work independently, so you can have AI Toolbox in Arabic RTL while the Claude chat pane remains in whatever language Anthropic sets.
Are there plans to add more languages?
AI Toolbox currently supports 10 languages covering the major language families on the web. Additional locales may be added as the user base requests them. Support-language requests can be sent to [email protected].
Does AI Toolbox work offline in any language?
AI Toolbox works partially offline because the search index is local IndexedDB, but claude.ai itself requires a connection. The UI language setting works offline since all translations are bundled with the extension. Search, bookmarks, and export function against the local index even without an active Claude session.
Does AI Toolbox fix Claude's RTL for Firefox?
No. AI Toolbox for Claude is a Chromium extension and runs on Chrome, Edge, Brave, Opera, and Arc, not Firefox. A separate Firefox add-on named "Claude RTL Fix" exists, but it does not help Chromium users. If you are on Chrome, Edge, Brave, Opera, or Arc, install AI Toolbox and set the language to Arabic or Hebrew to apply RTL layout.
Bottom Line
AI Toolbox provides 10 interface languages and full RTL layout for Arabic and Hebrew, included free on every plan, on Chromium browsers (Chrome, Edge, Brave, Opera, Arc). If Claude's broken Hebrew or Arabic RTL alignment is the problem you are trying to fix, setting the AI Toolbox language to AR or HE applies dir="rtl" and mirrors the extension UI to the correct direction.
A Full Stack Developer with 7+ years of experience building AI productivity tools. Leads product development and frontend architecture for AI Toolbox, the Chrome extension suite (ChatGPT, Gemini, and Claude modules) that helps users search, organize, and export their AI conversations.
Adi Leviim