I just "shipped" a new feature I've been working on for a little while for my F/OSS browser based transcription tool Transcriberer. You can now define "text snippets" that can be inserted using keyboard shortcuts.
This feature was requested by @gdg, who is using it to insert the speaking person's name into transcripts.
If you have need of such a tool, I hope you find it useful ^_^
https://gitlab.com/Cheeseness/transcriberer
http://transcriberer.jbushproductions.com/