No not really, many of the languages have characters in common or sounds in common to our alphabet. Surely words and expressions as well as structures of the languages are different.

I do too! I grew up in a German speaking home. I took Spanish all through grade school and college, but left it to do a minor in German because the important part of language is being able to communicate. I found that I was translating literature into Spanish and visa versa and all that was important was not developing fluency, rather where all the accent marks go, etc. So I have some Spanish skills, a minor in German, I had to take a non Indo-European language for my degree requirements, so I took that in conversational Hebrew. After high school I lived overseas and taught myself Italian from a Berlitz book and immersed myself in the language and culture. Therefore, I got very fluent in Italian. Of course, my main concern was the structure and components of English with linguistic rules. The only way to really get fluent in a language is immersion along with instruction. That's why living in a country that speaks a different language is the best way to develop any language. It becomes a survival skill that you have to use. Unfortunately, there is also language loss when we so not use the language and a big difference between conversational language and academic language.