noto-fonts VS FiraSans

What I'm personally using for this is Noto (short for "no tofu," with "tofu" referring to the missing character glyphs), accessible with noto-fonts and noto-fonts-extra (there's also noto-fonts-emoji which might be useful), though each pretty much needs to be added as a fallback separately. For CJK / Han characters, Babelstone (at babelstone-han) has good coverage, though the version in Nixpkgs isn't quite up to date so you may want to get a newer one from their website. If you really want complete Unicode coverage, the last font that I know of that you'd want is Hanazono. Hanazono isn't in Nixpkgs at all, and comes in two parts: HanaMinA and HanaMinB.

In a font that supports multiple writing systems, whether Latin, Cyrillic, or even Chinese/Japanese/Korean characters, the glyphs from different systems should be designed to harmonize. Having different visual weights is incorrect. See Google's Noto font family, for example.

Noto Sans

I use Iosevka for the terminal emulator and the editor. And Noto for the rest.

I saw a post from 2015 saying they are adding a font combing all the noto fonts from a region like south asia, is it done?

I would think as long as you use a font that supports both languages, Gramps should be able to display either. The interface would need to be in one or the other, but things like names and notes could be either and still display properly as long as the font supports it. Noto Sans is one good choice for multiple languages.

I checked recent commits on Google's Noto fonts repo (https://github.com/googlefonts/noto-fonts/blob/main/hinted/ttf/NotoSans/NotoSans-Italic.ttf) and the version of NotoSans-Italic for all of the three commits after November 3, 2021 seems fine, at least when opened in KFontView or FontForge. Assuming the Arch package uses the same data as the Github repo, this is not an upstream issue (unless I missed something, of course).

Luckily for us, Ren'Py has an easy way to support this problem. You can have several fonts, and define which langage use which font. Either you find fonts that are visually fitting together (looking "modern" or not, etc). Or you can use something like Google's Noto collection of fonts that has fonts for most langages. You can use "noto serif" for latin langages, "noto serif japanese" for the japanese translation, etc etc.

I think you might be taking the wrong approach here. You're right, some devices (anything that isn't Mac or Windows) don't have the "base 14" fonts available, but they don't need to if you just use embedded fonts in the generated PDFs. Any OFL-licensed font can be freely distributed with your app, and can be embedded in the PDFs generated by your app. Like all licenses you should read it yourself and not take my word for it, of course.

Fira Sans

A very pleasant detail with regards these typefaces, they are licensed under the Open Font Licence and are free (as in speech as well as in beer) to use.

Many free fonts on Google Fonts are available under the [Open Font License (OFL)](https://scripts.sil.org/OFL) and [Apache License](https://www.apache.org/licenses/LICENSE-2.0.txt). The OFL is very short and has some clear guidance on how the fonts can be used, so maybe that would be worth looking into!

Or should I better limit myself to use in CC BY PDFs only fonts that themselves can be freely redistributed, reused, remixed, such as those available under the SIL Open Font License?

This Font Software is licensed under the SIL Open Font License, Version 1.1. This license is copied below, and is also available with a FAQ at: http://scripts.sil.org/OFL

With the exception of Courier Prime, which is released under the Open Font Licence, there are no fonts "in" Scrivener. Whatever you see are fonts you've installed to the system or those that came with it.

To get Puppeteer to render emojis, you can use Noto Fonts published under SIL Open Font License (OFL) v1.1.

Fira Sans Medium: https://github.com/bBoxType/FiraSans

In terms of mono fonts that look like Comic Sans, I am surprised no one has mentioned Fantasque Sans Mono: https://github.com/belluzj/fantasque-sans

Fira is, to my eyes, an open source font which looks similar to Trebuchet MS, and there is the very popular monospace variant Fira Code: https://v-fonts.com/fonts/fira-code https://github.com/tonsky/FiraCode

Not to mention the original Fira Mono: https://github.com/bBoxType/FiraSans/blob/master/Fira_Mono_3... for a sample or https://github.com/bBoxType/FiraSans to download.