Hi @Santiesteban, Athena,
Thank you for reaching out and for clearly explaining your situation.
I appreciate you sharing how important it is to communicate in both English and Spanish, and how features like autocorrect and spellcheck play a key role in supporting your productivity - especially when managing dyslexia.
At the moment, Outlook on the web doesn’t offer a single “add a second language” switch like Microsoft Word does. Instead, language support is handled through Microsoft Editor (which is built into the email composer) and, in some cases, through your web browser’s spellcheck settings.
Below are several options you can use to enable and work comfortably with both languages:
Option 1: Add Spanish as an additional proofing language in Microsoft Editor
(Recommended – keeps English and Spanish available together)
- In Outlook on the web, select New mail.
- In the message editor, open Options > Editor.
- Select Editor settings.
- Choose Manage spell check languages.
- Under Proofing languages, select + Add another language.
- Choose Spanish (for example: Español – Estados Unidos, México, or España), then select Add > Done.
This allows Editor to recognize Spanish alongside English and provide spelling and grammar suggestions while you write emails.

Option 2: Enable multi‑language spellcheck in your browser
Since Outlook on the web runs inside a browser, enabling browser‑level spellcheck for both languages can improve consistency - especially if Editor doesn’t reliably detect both.
Microsoft Edge:
- Open
edge://settings/languages
- Add Spanish to your preferred languages.
- Under Writing assistance, enable spellcheck/grammar for Spanish while keeping English enabled.
Google Chrome:
- Open Chrome Settings > Languages.
- Under Spell check, turn on spell check (Basic or Enhanced).
- Enable spellcheck for English and Spanish.
For more detail steps: Turn Chrome spell check on and off - Google Help.
This link is shared by community members for your convenience. It points to a third-party site that is not managed or verified by Microsoft. We can’t guarantee the quality, safety, or suitability of any content or software found there. Please review carefully and make sure you understand any potential risks before using it.
Option 3: Add Spanish as a language/keyboard in Windows
Even if you continue typing with your existing keyboard layout, adding Spanish as an input language can help Windows and Microsoft apps better recognize and detect language usage.
Microsoft also recommends adding appropriate input languages when working in multiple languages to improve spellcheck and grammar detection: Set up or change the languages used to check spelling and grammar.
I hope these options help improve your email‑writing experience and make working in both languages smoother and faster. Please try the steps above and let me know which option works best for you. If the issue continues, I'm happy to explore additional solutions together.
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Thank you for your kindness and for contributing to the forum.
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