@Hantu, Thanks for posting in Q&A. For your question, based on my researching, I find the following link to describe the method to create Custom Text Shortcuts in SwiftKey. You can refer it.
https://www.maketecheasier.com/setup-custom-text-shortcuts-android/
Note: Non-Microsoft link, just for the reference.
As we are not familiar with this, if you want to know more about it, you can contact the support in the following link to get more help.
https://support.microsoft.com/en-us/swiftkey
Thanks for your understanding.
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