That's where I'd like them to specify the sample background "Acolyte of Tyr" would have Celestial, while "Acolyte of Aurile" would get Infernal, for example. Having them side by side would emphasize the need to customize.
In my game, I associate all religions with a liturgical language, which I think I picked up somewhere in 3E.
At the very least, I'd like to see 5E Planescape put out a few more planar languages than we have now. The lawful planes seem extremely likely to have a single language -- that's the kind of thing they'd all dig -- which we could call Axiomatic, to bring back a 3Eism.
The Cthonic fiends who play both sides of the Blood War against one another seem like an ideal group to have their own language that they look down upon others knowing or using. (Telepathy can't be used for everything.)
If the Feywild uses Sylvan as its Common tongue (which I would have liked them to have at least nodded at in Wild Beyond the Witchlight, which I missed, if they did), the Shadowfell, which also has developed societies and even trade, seems like it ought to, independent of the Domains of Dread. Call it Umbral.
Yes, but I feel they strived for equality here, not to make a background having "more" than any other. And a language isn't something that is worth foregoing a feat, a prociency or an ASI.
It's officially as good as a tool proficiency. I'd like them to boost the value of tool proficiencies rather than just give up on them and broadly declare everyone in Generic D&Dland to be multilingual. (And yes, lots of people in real life are multilingual. But it's only specific cultures where that's the default.)
Races are "everything innate". Classes are "everything learnt as part of the main job" and Background are "everything learnt culturally". I can't see languages fitting elsewhere than background, unless one would want to make them a separate category.
If wizardly magic is built on Draconic, which has been the idea, to a greater or lesser extent for three editions, it seems hard for me to imagine wizards not getting it by default, as part of being a wizard. It's apparently the machine code of the multiverse.
Common (which is in fact "Human" since they don't have a racial language) is also problematic. Racial languages should be removed and replaced by regional languages, unless there is a strong in-setting reason to explain them (ie, every member of this race dreams in the language of his gods, which teach him new words here and there).
100% yes.
I would be A-OK with the removal of all racial languages.