When you are deciding whether or not to make your site multilingual, first consider who your audience is. Logos and Slogans. They aren't set it stone but make some good ones the first time. Spend a lot of time on both, and if you can afford professional advice, it's not a bad idea. In general, your logo and slogan should be on every page of your site.
Consistency is everything.
Email market but don't lose your good name. Send emails only to those that opt-in. E-newsletters benefit you and the customer if they are done right. Keep it short and sweet. Send the newsletters at consistent increments and make your material easy to understand.