LanguageTool

LanguageTool is an advanced AI-based writing assistant and text editor designed to improve writing quality. It goes beyond simple spelling and grammar checking by offering features like:

Detection and correction of grammar, spelling, and punctuation errors

Style improvements, including suggestions to avoid overused or redundant words

Support for more than 20 languages

Fixing formatting inconsistencies such as times, numbers, and currency

Personalized features like a personal dictionary and style guide

Integration with various platforms and applications, including web browsers, Microsoft Word, Google Docs, LibreOffice, and more

An online editor and browser extensions to check text while typing on the web

Advanced AI and open-source technology behind it

Premium options with enhanced error detection, unlimited rephrasing, and team collaboration features
It is available as free and premium versions, with the core being open-source and downloadable for offline use. LanguageTool is designed to help users write precisely, clearly, and stylishly across different types of texts and languages.
In short, LanguageTool is a comprehensive grammar, style, and spell checker that acts as a powerful writing assistant to make your writing error-free and polished. [perplexity.ai]

LanguageTool是一款先进的基于AI的写作助手和文本编辑器，旨在提高写作质量。它超越了简单的拼写和语法检查，提供以下功能：

检测和修正语法、拼写和标点错误

风格改进，包括避免使用过多或冗余词汇的建议

支持超过20种语言

修复时间、数字和货币等格式不一致

个性化功能，如个人词典和风格指南

与各种平台和应用的集成，包括网络浏览器、Microsoft Word、Google Docs、LibreOffice等

在线编辑器和浏览器扩展，在线输入时进行文本检查

背后的先进AI技术和开源技术

付费选项包括增强的错误检测、无限重写和团队协作功能
它有免费的和付费的版本，核心功能为开源，可离线下载使用。LanguageTool旨在帮助用户在不同类型的文本和语言中写作精准、清晰和风格优雅。
简而言之，LanguageTool是一个全面的语法、风格和拼写检查工具，作为强大的写作助手，帮助您使写作无误且精练。 [perplexity.ai]

install

Ubuntu 22 ARM

¹ ² ³

Decompress ngrams-en-*.zip to /mnt/<disk>/share/ngrams/.

sudo apt install openjdk-21-jdk
sudo unzip LanguageTool-stable.zip
sudo mv LanguageTool-* /opt/languagetool

sudo apt install make g++
git clone --depth=1 https://github.com/facebookresearch/fastText
cd fastText
make
sudo vim /opt/languagetool/server.properties

fasttextModel=fasttext/lid.176.bin
fasttextBinary=fasttext/fasttext

sudo vim /etc/systemd/system/languagetool.service

[Unit]
Description=LanguageTool Service
After=network.target

[Service]
ExecStart=java -cp /opt/languagetool/languagetool-server.jar org.languagetool.server.HTTPServer --languagemodel /mnt/<nvme>/share/ngrams --port 8040 --allow-origin --public
WorkingDirectory=/opt/languagetool
Restart=on-abnormal

[Install]
WantedBy=multi-user.target

sudo systemctl enable --now languagetool.service

Get ngrams-en-*.zip from here.
Get LanguageTool Desktop version for offline use from LanguageTool embedded HTTP Server.

Windows 10

Install OpenJDK，I tested it on openjdk17.
Decompress ngrams-en-*.zip to ngrams/.
Decompress LanguageTool-stable.zip to LanguageTool/.

unzip LanguageTool-stable.zip
java.exe -cp LanguageTool\languagetool-server.jar org.languagetool.server.HTTPServer --languagemodel <ngrams_dir> --port <port> --allow-origin

For running it liked service, create languagetool_service.cmd from the command above. Then create languagetool_service.vbs:

Set WshShell = CreateObject("WScript.Shell")
	WshShell.Run chr(34) & "languagetool_service.cmd" & Chr(34), 0
Set WshShell = Nothing

Create shortcut of languagetool_service.vbs, put it into C:\Users\User\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.

Browser Extension

Install Browser Extension.
Browser Extension → Settings → Advanced settings → Other server → http://<your_host>:<port>/v2.
General settings → Show in right-click menu (On).

annex

languagetool.mp4, (bilibili