Yeah - there’s quite a few websites that provide MS Office - and any number of other fonts - for free. Trouble is - their legality is somewhat questionable.
Calibri is proprietary. To use it legitimately outside of Windows / MS Office you need a licence from Monotype. It shouldn’t be available on that site as a download.
Also - that site only gives a single True Type - whereas there should be regular, italic, bold, and bold italic. At least that’s the case with Carlito on my system.
Ok, I think I can find it on my system and extract the font
I know embedding fonts in word docs does work if another org opens your document, so the appearance is the same, but unsure how LibreOffice deals with it.
Perhaps this can be included into the generic blank page template, if copyright is not an issue for you?
Hello,
I really don’t understand what you mean in “Perhaps this can be included into the generic blank page template, if copyright is not an issue for you?”
- Can you define “this” ?
- Can you describe the steps that it would need to take?
- Can you explain the context (which OS? Which other Office suite involved?)
- Can you write about the idea behind : such as a step by step suite of actions to test your idea?
Using Ubuntu, version 25.04 Plucky, In LibreOffice Writer, version 25.2.3 I see a replacement table option for the fonts, in the menu Tools > Options, but no option to embed fonts in documents. It might be what is already the default.
I checked OnlyOffice Desktop editors, there are very few settings that can be done, none related to default fonts or else. You choose your fonts on a per document basis, and the fonts have to be installed in the system if you want they to show.
If you want to explore more around the topic, you would have to check your version of Word, and have LibreOffice and OnlyOffice Desktop Editors installed in the same system.
https://www.libreoffice.org - https://www.onlyoffice.com/download-desktop.aspx
The issue with word being created with one font, then emailed to another person with a different font set caused issues. For many years (if not decades), Word has enabled you to imbed either only the characters used, or the whole font set into document. This in word can be done on a Word page by selecting File, Options, on left side select Save, and towards the bottom in a light grey title you have Preserve fidelity when sharing this document.
I think in the older Word, it was under File, Preference? but that was 2003
I strongly suspect you can save the document as a Template, but you may have to cheat by embedding some spaces of different fonts, or white characters into the margin, or header or footers.
I was unaware if Libre office can handle these word documents or not. Edit:
I using Word absolutely needed? Can you instead, use a raw text file? (Which would be font-agnostic) Or Use Scribus? Can you just not use Word? 
Also, have you tried Office365 online?