There are only a few things that need (IMO) to be changed. I suggest:
I undertook (instead of "I have undertaken....")
I began studying Spanish (instead of "I started to study Spanish")
world leader (instead of "unquestionable world leader")
their products
I rate their products highly for innovation and design.
Since I was a child I have always wanted to learn to speak one of the Asian languages.
I believe I would be a perfect fit for the position (at Vulcanus).
