I want to congratulate you on your birthday. 50 years, you are helping to learn languages and enables to see the world. Learn all the fun of the countries and continents. Helps you find friends from other countries. I hope that 50 is just the beginning for you.
Margarita, I will suggest some changes. I hope I am not changing the intent of you message.
I want to congratulate you on your 50th birthday. You have been helping people learn languages, which enabled them to see the world. You have helped them learn fun things about other countries and continents, and have helped them find friends in those countries. I hope that 50 is just is just the beginning for you!
*intent of YOUR message.