Fix minor question and locale issues (#1786)

* add missing locales

* use t.Setenv instead of os.Setenv for tests

* locale: present y/n if localisation is not latin. Always accept y/n in every case

* question: use operation info for question

* edge case where localised n is equal to default y

* add tests for basic locales

.golangci.yml

@@ -64,6 +64,7 @@ linters:
     - unconvert
     - unparam
     - unused
+    - tenv
     - varcheck
     - whitespace
     - wsl