Honestly, It feels stale to you, but It’s not for the person reading it. You've done all the good stuff going to chatgpt for alternatives, the only other thing I can think of is respond with gifs if your brand allows. But at the end of the day, the happy dance they do in the seat when they announce their cert and to see a message pop up that says, “Congrats! You put in the work and made this happen.” will make anyone beam.
One thing I am noticing, is not perfect grammar makes things feel personable. Also, as you expand to a wider audience, especially one that shares articles, have you thought about comments that start conversations? It’ll require you to give your team latitude. But, for example, if someone posts an article about how the Sky is blue, a conversation starter could be, “this finding has been popping up lately, we think it’s really important to also notice the connection between the blue sky and [something about your industry] because it really shows a symbiotic realtionship OR We actually piloted a training around how this impacts [someting about your industry] we noticed X, but would love to hear what you think.
Basically it takes curiosity about why they posted something and intersection of what they saw as important and your field.
Hope the rambling was helpful or got thoughts going.
