Most countries will grant PR without requiring a language proficiency. Assuming your immigration status is regular and you are a contributing member of society.
Citizenship? Absolutely, you must speak the language. Residency? Not nearly as common.
Citizenship? Absolutely, you must speak the language. Residency? Not nearly as common.
Hmm, is that really the case? Or perhaps you're confusing work visas with permanent residency? Most attractive destinations for immigrants usually require a language test for PR. Ignoring the United States and its dysfunctional immigration system, a language test is required or practically required almost anywhere there is a points-based system to obtain PR. The UK requires a language exam to be granted leave to remain. Canadian federal programs for PR require a language test result to even be considered for the Express Entry program. In Europe, Germany, Austria, Denmark, Norway, Sweden, Italy also require it, and I'm sure there are more I'm not aware of.
Also, B1 is honestly a very basic level of proficiency with the language. It is really hard to be a productive member of society and interact with locals if you cannot speak at a B1 level.
United States issues the highest absolute number of permanent residency permits in the world. It grants approximately 1 to 1.4 million lawful permanent resident (LPR) cards (Green Cards) annually
Historically, this can originally be blamed on the desire of the US to import as many European immigrants as quickly as it could after the slaves were freed (post-"1877 Compromise"), because ex-slave votes were changing the composition of government. In 1910, only 60% of white Americans were native born (as opposed to about 98.5% of black Americans.) This period is also referred to as the "nadir of American race relations."
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Footnotes:
[1]: As long as at least one parent is a permanent resident and has in Germany for at least 5 years (the same duration that's usually required to become a permanent resident anyway)
This statement is clearly false, off the top of my head only USA and Spain come to mind. There are some countries like Japan where there it isn't a hard requirement, but you'd need a very good reason to justify why
For example: 1) Low birth rates and high ageing population percentage, this can be offset with immigration. Then PR status can be granted, as a kind of carrot and better tax revenue generation "filter". 2) Labor market manipulation and facilitating international business, where immigration is used to fill holes in various industries.
Why a country would want to grant PR, usually has different purposes from citizenship. There is overlap, but they aren't the same.