Text processing using pre-writen text blocks

[oui]

with (better) or not https://en.wikipedia.org/wiki/Boilerplate_(text)
boilerplate language or templates processor


like described at M$ https://support.office.com/fr-fr/articl ... 43ddc4b186

(I don't know how to find the English original text!)

is there a Linux WYSYG text system able to do that? With language / templates processor? With (I hope big) text collection with index and possibly the ability to process using only marking in the index to collect the text blocks?