Overleaf's spell-checker now supports five additional languages: Italian, Portuguese (Brazil), Czech, Ukrainian and Polish - Overleaf, Online LaTeX Editor
GitHub - valentjn/vscode-ltex: LTeX: Grammar/spell checker for VS Code using LanguageTool with support for LaTeX , Markdown , and others
![mac - How do I change the spellcheck language of Texmaker to US English? - TeX - LaTeX Stack Exchange mac - How do I change the spellcheck language of Texmaker to US English? - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/9hzXy.png)