Is it possible to translate only a specific part of a text description?

Is it possible to translate only a specific part of a text description?

Example of my text:
Breathe a cone of rancid fire, choking opponents hit. This attack stops them from using breath weapons for #Duration and dealing up to #TotalDamage.
I want to switch #Duration to [x] seconds and #TotalDamage to [x] points of damage.

But when trying to modify this stuff i'm running into the problem of not being able to use the i2 localize component because it needs a set description(Which will change in parts for me). And Google Translate is slow not working with ui well since it loads late (about 3 seconds for longer descriptions).

Additional context:
I am already searching for those keywords and replacing them with something along the lines of <color=\"purple\">" + duration + " seconds" + "</color> so the final text after replacing it will look like

Breathe a cone of rancid fire, choking opponents hit. This attack stops them from using breath weapons for <color="purple">1.5 seconds</color>and dealing up to <color="orange">480 total damage</color>.

What should I do?

Thanks for taking the time to read this!

I was looking at the parameters which you linked but it never shows an example of setting a global parameter by code only taking a specifically designated one. Can you toss me an example of setting one to a value then grabbing that value? I'm assuming creating that is just whatever the term you are looking for is in the text box ( {[x]} )