A family of Microsoft word processing software products for creating web, email, and print documents.
Rather than "regular", based on the 25-plus years that I have been assisting users of Microsoft Word, I would say that it is "very unusual"
However, using the Replace facility would definitely be the easiest way. I would suggest however that you use the following Wildcard search.
If you use the simple Replace that you mention, if you were to run it again, you would end up with four spaces between each Word and also, it does not result in two spaces between each Sentence.
However if you run the above Wildcard replace more that once, it will not add any additional spaces where there are already two spaces.