A major component of localizing content is to be able to set language and other contexts so that your Views, blocks, and other data may be country and language aware.
Out of the box, for a multilingual site you can visit:
And for OG you can visit:
/admin/config/group/context (requires OG Context module)
To set the types of context providers you wish to use, along with priorities. IP-detection modules also extend the list of options for multilingual options.