Add support for multiple languages

[em1dev]

• Provide support for spanish and english which could be preselected based on browser settings.
• Allow the user to customize lang specific messages to whatever they want.

Provide sensible defaults for certain languages for things like:

• Link replacement TTS message: 'Emy has sent a link' | 'Emy ha enviado un link'
• 'Replied' | 'Respondido' for replied messages. Or we could remove that msg and make it obvious its a reply based on how its designed