BUg 908633 - Don't require lang field on newsletter signup
Bug 773371 - [bedrock] Integrate Language Selector for M.o

Implemented a simple language switcher UI with a list of all available
translations of the current page.
Merge pull request #989 from kyoshino/bug-773371-lang-switcher

Bug 773371 - [bedrock] Integrate Language Selector for M.o
Bug 908633 - mark lang field required in HTML

If lang field is displayed, mark it required in HTML
Merge pull request #1213 from dpoirier/bug-908633-required-lang-field

Bug 908633 - Don't require lang field on newsletter signup