Can I teach Siri to spell a word the way I want it on my iPhone?

Hello Faderns1,

At this time, there is not a way to teach Siri how to spell a word. However, you can set up a shortcut for words or phrases using these steps:

"With text replacement, you can set shortcuts to automatically become longer phrases or words. When you enter the shortcut in a text field, your chosen word or phrase automatically replaces it. For example, you could type "GM" and "Good morning" would automatically replace it. 

To manage your text replacements, tap Settings > General > Keyboard > Text Replacement.

Add a text replacement

1. In the Settings app, tap General > Keyboard > Text Replacement.

2. Tap the Add button .

3. Enter your phrase and shortcut.

4. Tap Save.

Delete a text replacement

1. In the Settings app, tap General > Keyboard > Text Replacement.
2. Tap Edit.
3. Tap the Remove button, then tap Delete.
4. Tap Done."

More details here: How to use Auto-Correction and predictive text on your iPhone, iPad, or iPod touch

You can also follow this link to submit your suggestion to Apple concerning teaching Sir how to spell a word: iPhone - Feedback

Thanks for connecting with Apple Support Communities.

All the best.