Overleaf's spell-checker now supports five additional languages: Italian, Portuguese (Brazil), Czech, Ukrainian and Polish - Overleaf, Online LaTeX Editor
LaTeX: No spell check for user-defined commands · Issue #305 · streetsidesoftware/vscode-spell-checker · GitHub
GitHub - valentjn/vscode-ltex: LTeX: Grammar/spell checker for VS Code using LanguageTool with support for LaTeX , Markdown , and others
![spelling - Make spellchecker ignore contents of certain commands in TexMaker - TeX - LaTeX Stack Exchange spelling - Make spellchecker ignore contents of certain commands in TexMaker - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/R6cE7.png)